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ID dermatology: Advancements, but new challenges, over 50 years
When Stephen Tyring, MD, PhD, an infectious disease dermatologist, started his career in the early 1980s, he said “we were diagnosing Kaposi’s sarcoma right and left. We would see a new case every day or two.”
It was the early days of the HIV/AIDS epidemic, and dermatologists were at the forefront because HIV/AIDS often presented with skin manifestations. Dr. Tyring, clinical professor in the departments of dermatology, microbiology & molecular genetics and internal medicine at the University of Texas Health Science Center, Houston, and his colleagues referred Kaposi’s patients for chemotherapy and radiation, but the outlook was often grim, especially if lesions developed in the lungs.
Dermatologist don’t see much Kaposi’s anymore because of highly effective treatments for HIV.
Members of the original editorial advisory board saw it coming. In a feature in which board members provided their prediction for the 1970s that appeared in the first issue, New York dermatologist Norman Orentreich, MD, counted the “probable introduction of virucidal agents” as one of the “significant advances or changes that I foresee in the next 10 years.” J. Lamar Callaway, MD, professor of dermatology at Duke University, Durham, N.C., predicted that “the next 10 years should develop effective anti-viral agents for warts, herpes simplex, and herpes zoster.”
To celebrate the 50th anniversary of Dermatology News, we are looking back at how the field has changed since that first issue. The focus this month is infectious disease. There’s a lot to be grateful for but there are also challenges like antibiotic resistance that weren’t on the radar screens of Dr. Orentreich, Dr. Callaway, and their peers in 1970.
All in all, “the only thing I wish we did the old way is sit at the bedside and talk to patients more. We rely so much on technology now that we sometimes lose the art of medicine, which is comforting to the patient,” said Theodore Rosen, MD, an ID dermatologist and professor of dermatology at Baylor College of Medicine, Houston, who’s been in practice for 42 years.
“A lot of advancements against herpes viruses”
One of the biggest wins for ID dermatology over the last 5 decades has been the management of herpes, both herpes simplex virus 1 and 2, as well as herpes zoster virus. It started with the approval of acyclovir in 1981. Before then, “we had no direct therapy for genital herpes, herpes zoster, or disseminated herpes in immunosuppressed or cancer patients,” Dr. Rosen said.
“I can remember doing an interview with Good Morning America when I gave the first IV dose of acyclovir in the city of Houston for really bad disseminated herpes” in an HIV patient, he said, and it worked.
Two derivatives, valacyclovir and famciclovir, became available in the mid-1990s, so today “we have three drugs and some others at the periphery that are all highly effective not only” against herpes, but also for preventing outbreaks; valacyclovir can even prevent asymptomatic shedding, therefore possibly preventing new infections. “That’s a concept we didn’t even have 40 years ago,” Dr. Rosen said.
Cidofovir has also made a difference. The IV formulation was approved for AIDS-associated cytomegalovirus retinitis in 1996 but discontinued a few years later amid concerns of severe renal toxicity. It’s found a new home in dermatology since then, explained ID dermatologist Carrie Kovarik, MD, associate professor of dermatology at the University of Pennsylvania, Philadelphia.
Dermatologists see acyclovir-resistant herpes “heaped up on the genitals in HIV patients,” and there weren’t many options in the past. A few years ago, “we [tried] injecting cidofovir directly into the skin lesions, and it’s been remarkably successful. It is a good way to treat these lesions” if dermatologists can get it compounded, she said.
Shingles vaccines, first the live attenuated zoster vaccine (Zostavax) approved by the Food and Drug Administration in 2006 and the more effective recombinant zoster vaccine (Shingrix) approved in 2017, have also had a significant impact.
Dr. Rosen remembers what it was like when he first started practicing over 40 years ago. Not uncommonly, “we saw horrible cases of shingles,” including one in his uncle, who was left with permanent hand pain long after the rash subsided.
Today, “I see much less shingles, and when I do see it, it’s in a much-attenuated form. [Shingrix], even if it doesn’t prevent the disease, often prevents postherpetic neuralgia,” he said.
Also, with pediatric vaccinations against chicken pox, “we’re probably going to see a whole new generation without shingles, which is huge. We’ve made a lot of advancements against herpes viruses,” Dr. Kovarik said.
“We finally found something that helps”
“We’ve [also] come a really long way with genital wart treatment,” Dr. Kovarik said.
It started with approval of topical imiquimod in 1997. “Before that, we were just killing one wart here and one wart there” but they would often come back and pop up in other areas. Injectable interferon was an option at the time, but people didn’t like all the needles.
With imiquimod, “we finally [had] a way to target HPV [human papillomavirus] and not just scrape” or freeze one wart at a time, and “we were able to generate an inflammatory response in the whole area to clear the virus.” Working with HIV patients, “I see sheets and sheets of confluent warts throughout the whole genital area; to try to freeze that is impossible. Now I have a way to get rid of [genital] warts and keep them away even if you have a big cluster,” she said.
“Sometimes, we’ll do both liquid nitrogen and imiquimod. That’s a good way to tackle people who have a high burden of warts,” Dr. Kovarik noted. Other effective treatments have come out as well, including an ointment formulation of sinecatechins, extracted from green tea, “but you have to put it on several times a day, and insurance companies don’t cover it often,” she said.
Intralesional cidofovir is also proving to be boon for potentially malignant refractory warts in HIV and transplant patients. “It’s an incredible treatment. We can inject that antiviral into warts and get rid of them. We finally found something that helps” these people, Dr. Kovarik said.
The HPV vaccine Gardasil is making a difference, as well. In addition to cervical dysplasia and anogenital cancers, it protects against two condyloma strains. Dr. Rosen said he’s seeing fewer cases of genital warts now than when he started practicing, likely because of the vaccine.
“Organisms that weren’t pathogens are now pathogens”
Antibiotic resistance probably tops the list for what’s changed in a bad way in ID dermatology since 1970. Dr. Rosen remembers at the start of his career that “we never worried about antibiotic resistance. We’d put people on antibiotics for acne, rosacea, and we’d keep them on them for 3 years, 6 years”; resistance wasn’t on the radar screen and was not mentioned once in the first issue of Dermatology News, which was packed with articles and ran 24 pages.
The situation is different now. Driven by decades of overuse in agriculture and the medical system, antibiotic resistance is a concern throughout medicine, and unfortunately, “we have not come nearly as far as fast with antibiotics,” at least the ones dermatologists use, “as we have with antivirals,” Dr. Tyring said.
For instance, methicillin-resistant Staphylococcus aureus (MRSA), first described in the United States in 1968, is “no longer the exception to the rule, but the rule” itself, he said, with carbuncles, furuncles, and abscesses not infrequently growing out MRSA. There are also new drug-resistant forms of old problems like gonorrhea and tuberculosis, among other developments, and impetigo has shifted since 1970 from mostly a Streptococcus infection easily treated with penicillin to often a Staphylococcus disease that’s resistant to it. There’s also been a steady march of new pathogens, including the latest one, SARS-CoV-2, the virus that causes COVID-19, which has been recognized as having a variety of skin manifestations.
“No matter how smart we think we are, nature has a way of putting us back in our place,” Dr. Rosen said.
The bright spot is that “we’ve become very adept at identifying and characterizing” microbes “based on techniques we didn’t even have when I started practicing,” such as polymerase chain reaction. “It has taken a lot of guess work out of treating infectious diseases,” he said.
The widespread use of immunosuppressives such as cyclophosphamide, mycophenolate, azathioprine, rituximab, and other agents used in conjunction with solid organ transplantation, has also been a challenge. “We are seeing infections with really odd organisms. Just recently, I had a patient with fusarium in the skin; it’s a fungus that lives in the dirt. I saw a patient with a species of algae” that normally lives in stagnant water, he commented. “We used to get [things like that] back on reports, and we’d throw them away. You can’t do that anymore. Organisms that weren’t pathogens in the past are now pathogens,” particularly in immunosuppressed people, Dr. Rosen said.
Venereologists no more
There’s been another big change in the field. “Back in the not too distant past, dermatologists in the U.S. were referred to as ‘dermatologist-venereologists.’ ” It goes back to the time when syphilis wasn’t diagnosed and treated early, so patients often presented with secondary skin complications and went to dermatologists for help. As a result, “dermatologists became the most experienced at treating it,” Dr. Tyring said.
That’s faded from practice. Part of the reason is that as late as 2000, syphilis seemed to be on the way out; the Centers for Disease and Control and Prevention even raised the possibility of elimination. Dermatologists turned their attention to other areas.
It might have been short-sighted, Dr. Rosen said. Syphilis has made a strong comeback, and drug-resistant gonorrhea has also emerged globally and in at least a few states. No other medical field has stepped in to take up the slack. “Ob.gyns. are busy delivering babies, ID [physicians are] concerned about HIV, and urologists are worried about kidney stones and cancer.” Other than herpes and genital warts, “we have not done well” with management of sexually transmitted diseases, he said.
“I could sense” his frustration
The first issue of Dermatology News carried an article and photospread about scabies that could run today, except that topical permethrin and oral ivermectin have largely replaced benzyl benzoate and sulfur ointments for treatment in the United States. In the article, Scottish dermatologist J. O’D. Alexander, MD, called scabies “the scourge of mankind” and blamed it’s prevalence on “an offhand attitude to the disease which makes control very difficult.”
“I could sense this man’s frustration that people were not recognizing scabies,” Dr. Kovarik said, and it’s no closer to being eradicated than it was in 1970. “It’s still around, and we see it in our clinics. It’s a horrible disease in kids we see in dermatology not infrequently,” and treatment has only advanced a bit.
The article highlights what hasn’t changed much in ID dermatology over the years. Common warts are another one. “With all the evolution in medicine, we don’t have any better treatments approved for common warts than we ever had.” Injecting cidofovir “works great,” but access is a problem, Dr. Tyring said.
Onychomycosis has also proven a tough nut to crack. Readers back in 1970 counted the introduction of the antifungal, griseofulvin, as a major advancement in the 1960s; it’s still a go-to for tinea capitis, but it didn’t work very well for toenail fungus. Terbinafine (Lamisil), approved in 1993, and subsequent developments have helped, but the field still awaits more effective options; a few potential new agents are in the pipeline.
Although there have been major advancements for serious systemic fungal infections, “we’ve mainly seen small steps forward” in ID dermatology, Dr. Tyring said.
Dr. Tyring, Dr. Kovarik, and Dr. Rosen said they had no relevant disclosures.
When Stephen Tyring, MD, PhD, an infectious disease dermatologist, started his career in the early 1980s, he said “we were diagnosing Kaposi’s sarcoma right and left. We would see a new case every day or two.”
It was the early days of the HIV/AIDS epidemic, and dermatologists were at the forefront because HIV/AIDS often presented with skin manifestations. Dr. Tyring, clinical professor in the departments of dermatology, microbiology & molecular genetics and internal medicine at the University of Texas Health Science Center, Houston, and his colleagues referred Kaposi’s patients for chemotherapy and radiation, but the outlook was often grim, especially if lesions developed in the lungs.
Dermatologist don’t see much Kaposi’s anymore because of highly effective treatments for HIV.
Members of the original editorial advisory board saw it coming. In a feature in which board members provided their prediction for the 1970s that appeared in the first issue, New York dermatologist Norman Orentreich, MD, counted the “probable introduction of virucidal agents” as one of the “significant advances or changes that I foresee in the next 10 years.” J. Lamar Callaway, MD, professor of dermatology at Duke University, Durham, N.C., predicted that “the next 10 years should develop effective anti-viral agents for warts, herpes simplex, and herpes zoster.”
To celebrate the 50th anniversary of Dermatology News, we are looking back at how the field has changed since that first issue. The focus this month is infectious disease. There’s a lot to be grateful for but there are also challenges like antibiotic resistance that weren’t on the radar screens of Dr. Orentreich, Dr. Callaway, and their peers in 1970.
All in all, “the only thing I wish we did the old way is sit at the bedside and talk to patients more. We rely so much on technology now that we sometimes lose the art of medicine, which is comforting to the patient,” said Theodore Rosen, MD, an ID dermatologist and professor of dermatology at Baylor College of Medicine, Houston, who’s been in practice for 42 years.
“A lot of advancements against herpes viruses”
One of the biggest wins for ID dermatology over the last 5 decades has been the management of herpes, both herpes simplex virus 1 and 2, as well as herpes zoster virus. It started with the approval of acyclovir in 1981. Before then, “we had no direct therapy for genital herpes, herpes zoster, or disseminated herpes in immunosuppressed or cancer patients,” Dr. Rosen said.
“I can remember doing an interview with Good Morning America when I gave the first IV dose of acyclovir in the city of Houston for really bad disseminated herpes” in an HIV patient, he said, and it worked.
Two derivatives, valacyclovir and famciclovir, became available in the mid-1990s, so today “we have three drugs and some others at the periphery that are all highly effective not only” against herpes, but also for preventing outbreaks; valacyclovir can even prevent asymptomatic shedding, therefore possibly preventing new infections. “That’s a concept we didn’t even have 40 years ago,” Dr. Rosen said.
Cidofovir has also made a difference. The IV formulation was approved for AIDS-associated cytomegalovirus retinitis in 1996 but discontinued a few years later amid concerns of severe renal toxicity. It’s found a new home in dermatology since then, explained ID dermatologist Carrie Kovarik, MD, associate professor of dermatology at the University of Pennsylvania, Philadelphia.
Dermatologists see acyclovir-resistant herpes “heaped up on the genitals in HIV patients,” and there weren’t many options in the past. A few years ago, “we [tried] injecting cidofovir directly into the skin lesions, and it’s been remarkably successful. It is a good way to treat these lesions” if dermatologists can get it compounded, she said.
Shingles vaccines, first the live attenuated zoster vaccine (Zostavax) approved by the Food and Drug Administration in 2006 and the more effective recombinant zoster vaccine (Shingrix) approved in 2017, have also had a significant impact.
Dr. Rosen remembers what it was like when he first started practicing over 40 years ago. Not uncommonly, “we saw horrible cases of shingles,” including one in his uncle, who was left with permanent hand pain long after the rash subsided.
Today, “I see much less shingles, and when I do see it, it’s in a much-attenuated form. [Shingrix], even if it doesn’t prevent the disease, often prevents postherpetic neuralgia,” he said.
Also, with pediatric vaccinations against chicken pox, “we’re probably going to see a whole new generation without shingles, which is huge. We’ve made a lot of advancements against herpes viruses,” Dr. Kovarik said.
“We finally found something that helps”
“We’ve [also] come a really long way with genital wart treatment,” Dr. Kovarik said.
It started with approval of topical imiquimod in 1997. “Before that, we were just killing one wart here and one wart there” but they would often come back and pop up in other areas. Injectable interferon was an option at the time, but people didn’t like all the needles.
With imiquimod, “we finally [had] a way to target HPV [human papillomavirus] and not just scrape” or freeze one wart at a time, and “we were able to generate an inflammatory response in the whole area to clear the virus.” Working with HIV patients, “I see sheets and sheets of confluent warts throughout the whole genital area; to try to freeze that is impossible. Now I have a way to get rid of [genital] warts and keep them away even if you have a big cluster,” she said.
“Sometimes, we’ll do both liquid nitrogen and imiquimod. That’s a good way to tackle people who have a high burden of warts,” Dr. Kovarik noted. Other effective treatments have come out as well, including an ointment formulation of sinecatechins, extracted from green tea, “but you have to put it on several times a day, and insurance companies don’t cover it often,” she said.
Intralesional cidofovir is also proving to be boon for potentially malignant refractory warts in HIV and transplant patients. “It’s an incredible treatment. We can inject that antiviral into warts and get rid of them. We finally found something that helps” these people, Dr. Kovarik said.
The HPV vaccine Gardasil is making a difference, as well. In addition to cervical dysplasia and anogenital cancers, it protects against two condyloma strains. Dr. Rosen said he’s seeing fewer cases of genital warts now than when he started practicing, likely because of the vaccine.
“Organisms that weren’t pathogens are now pathogens”
Antibiotic resistance probably tops the list for what’s changed in a bad way in ID dermatology since 1970. Dr. Rosen remembers at the start of his career that “we never worried about antibiotic resistance. We’d put people on antibiotics for acne, rosacea, and we’d keep them on them for 3 years, 6 years”; resistance wasn’t on the radar screen and was not mentioned once in the first issue of Dermatology News, which was packed with articles and ran 24 pages.
The situation is different now. Driven by decades of overuse in agriculture and the medical system, antibiotic resistance is a concern throughout medicine, and unfortunately, “we have not come nearly as far as fast with antibiotics,” at least the ones dermatologists use, “as we have with antivirals,” Dr. Tyring said.
For instance, methicillin-resistant Staphylococcus aureus (MRSA), first described in the United States in 1968, is “no longer the exception to the rule, but the rule” itself, he said, with carbuncles, furuncles, and abscesses not infrequently growing out MRSA. There are also new drug-resistant forms of old problems like gonorrhea and tuberculosis, among other developments, and impetigo has shifted since 1970 from mostly a Streptococcus infection easily treated with penicillin to often a Staphylococcus disease that’s resistant to it. There’s also been a steady march of new pathogens, including the latest one, SARS-CoV-2, the virus that causes COVID-19, which has been recognized as having a variety of skin manifestations.
“No matter how smart we think we are, nature has a way of putting us back in our place,” Dr. Rosen said.
The bright spot is that “we’ve become very adept at identifying and characterizing” microbes “based on techniques we didn’t even have when I started practicing,” such as polymerase chain reaction. “It has taken a lot of guess work out of treating infectious diseases,” he said.
The widespread use of immunosuppressives such as cyclophosphamide, mycophenolate, azathioprine, rituximab, and other agents used in conjunction with solid organ transplantation, has also been a challenge. “We are seeing infections with really odd organisms. Just recently, I had a patient with fusarium in the skin; it’s a fungus that lives in the dirt. I saw a patient with a species of algae” that normally lives in stagnant water, he commented. “We used to get [things like that] back on reports, and we’d throw them away. You can’t do that anymore. Organisms that weren’t pathogens in the past are now pathogens,” particularly in immunosuppressed people, Dr. Rosen said.
Venereologists no more
There’s been another big change in the field. “Back in the not too distant past, dermatologists in the U.S. were referred to as ‘dermatologist-venereologists.’ ” It goes back to the time when syphilis wasn’t diagnosed and treated early, so patients often presented with secondary skin complications and went to dermatologists for help. As a result, “dermatologists became the most experienced at treating it,” Dr. Tyring said.
That’s faded from practice. Part of the reason is that as late as 2000, syphilis seemed to be on the way out; the Centers for Disease and Control and Prevention even raised the possibility of elimination. Dermatologists turned their attention to other areas.
It might have been short-sighted, Dr. Rosen said. Syphilis has made a strong comeback, and drug-resistant gonorrhea has also emerged globally and in at least a few states. No other medical field has stepped in to take up the slack. “Ob.gyns. are busy delivering babies, ID [physicians are] concerned about HIV, and urologists are worried about kidney stones and cancer.” Other than herpes and genital warts, “we have not done well” with management of sexually transmitted diseases, he said.
“I could sense” his frustration
The first issue of Dermatology News carried an article and photospread about scabies that could run today, except that topical permethrin and oral ivermectin have largely replaced benzyl benzoate and sulfur ointments for treatment in the United States. In the article, Scottish dermatologist J. O’D. Alexander, MD, called scabies “the scourge of mankind” and blamed it’s prevalence on “an offhand attitude to the disease which makes control very difficult.”
“I could sense this man’s frustration that people were not recognizing scabies,” Dr. Kovarik said, and it’s no closer to being eradicated than it was in 1970. “It’s still around, and we see it in our clinics. It’s a horrible disease in kids we see in dermatology not infrequently,” and treatment has only advanced a bit.
The article highlights what hasn’t changed much in ID dermatology over the years. Common warts are another one. “With all the evolution in medicine, we don’t have any better treatments approved for common warts than we ever had.” Injecting cidofovir “works great,” but access is a problem, Dr. Tyring said.
Onychomycosis has also proven a tough nut to crack. Readers back in 1970 counted the introduction of the antifungal, griseofulvin, as a major advancement in the 1960s; it’s still a go-to for tinea capitis, but it didn’t work very well for toenail fungus. Terbinafine (Lamisil), approved in 1993, and subsequent developments have helped, but the field still awaits more effective options; a few potential new agents are in the pipeline.
Although there have been major advancements for serious systemic fungal infections, “we’ve mainly seen small steps forward” in ID dermatology, Dr. Tyring said.
Dr. Tyring, Dr. Kovarik, and Dr. Rosen said they had no relevant disclosures.
When Stephen Tyring, MD, PhD, an infectious disease dermatologist, started his career in the early 1980s, he said “we were diagnosing Kaposi’s sarcoma right and left. We would see a new case every day or two.”
It was the early days of the HIV/AIDS epidemic, and dermatologists were at the forefront because HIV/AIDS often presented with skin manifestations. Dr. Tyring, clinical professor in the departments of dermatology, microbiology & molecular genetics and internal medicine at the University of Texas Health Science Center, Houston, and his colleagues referred Kaposi’s patients for chemotherapy and radiation, but the outlook was often grim, especially if lesions developed in the lungs.
Dermatologist don’t see much Kaposi’s anymore because of highly effective treatments for HIV.
Members of the original editorial advisory board saw it coming. In a feature in which board members provided their prediction for the 1970s that appeared in the first issue, New York dermatologist Norman Orentreich, MD, counted the “probable introduction of virucidal agents” as one of the “significant advances or changes that I foresee in the next 10 years.” J. Lamar Callaway, MD, professor of dermatology at Duke University, Durham, N.C., predicted that “the next 10 years should develop effective anti-viral agents for warts, herpes simplex, and herpes zoster.”
To celebrate the 50th anniversary of Dermatology News, we are looking back at how the field has changed since that first issue. The focus this month is infectious disease. There’s a lot to be grateful for but there are also challenges like antibiotic resistance that weren’t on the radar screens of Dr. Orentreich, Dr. Callaway, and their peers in 1970.
All in all, “the only thing I wish we did the old way is sit at the bedside and talk to patients more. We rely so much on technology now that we sometimes lose the art of medicine, which is comforting to the patient,” said Theodore Rosen, MD, an ID dermatologist and professor of dermatology at Baylor College of Medicine, Houston, who’s been in practice for 42 years.
“A lot of advancements against herpes viruses”
One of the biggest wins for ID dermatology over the last 5 decades has been the management of herpes, both herpes simplex virus 1 and 2, as well as herpes zoster virus. It started with the approval of acyclovir in 1981. Before then, “we had no direct therapy for genital herpes, herpes zoster, or disseminated herpes in immunosuppressed or cancer patients,” Dr. Rosen said.
“I can remember doing an interview with Good Morning America when I gave the first IV dose of acyclovir in the city of Houston for really bad disseminated herpes” in an HIV patient, he said, and it worked.
Two derivatives, valacyclovir and famciclovir, became available in the mid-1990s, so today “we have three drugs and some others at the periphery that are all highly effective not only” against herpes, but also for preventing outbreaks; valacyclovir can even prevent asymptomatic shedding, therefore possibly preventing new infections. “That’s a concept we didn’t even have 40 years ago,” Dr. Rosen said.
Cidofovir has also made a difference. The IV formulation was approved for AIDS-associated cytomegalovirus retinitis in 1996 but discontinued a few years later amid concerns of severe renal toxicity. It’s found a new home in dermatology since then, explained ID dermatologist Carrie Kovarik, MD, associate professor of dermatology at the University of Pennsylvania, Philadelphia.
Dermatologists see acyclovir-resistant herpes “heaped up on the genitals in HIV patients,” and there weren’t many options in the past. A few years ago, “we [tried] injecting cidofovir directly into the skin lesions, and it’s been remarkably successful. It is a good way to treat these lesions” if dermatologists can get it compounded, she said.
Shingles vaccines, first the live attenuated zoster vaccine (Zostavax) approved by the Food and Drug Administration in 2006 and the more effective recombinant zoster vaccine (Shingrix) approved in 2017, have also had a significant impact.
Dr. Rosen remembers what it was like when he first started practicing over 40 years ago. Not uncommonly, “we saw horrible cases of shingles,” including one in his uncle, who was left with permanent hand pain long after the rash subsided.
Today, “I see much less shingles, and when I do see it, it’s in a much-attenuated form. [Shingrix], even if it doesn’t prevent the disease, often prevents postherpetic neuralgia,” he said.
Also, with pediatric vaccinations against chicken pox, “we’re probably going to see a whole new generation without shingles, which is huge. We’ve made a lot of advancements against herpes viruses,” Dr. Kovarik said.
“We finally found something that helps”
“We’ve [also] come a really long way with genital wart treatment,” Dr. Kovarik said.
It started with approval of topical imiquimod in 1997. “Before that, we were just killing one wart here and one wart there” but they would often come back and pop up in other areas. Injectable interferon was an option at the time, but people didn’t like all the needles.
With imiquimod, “we finally [had] a way to target HPV [human papillomavirus] and not just scrape” or freeze one wart at a time, and “we were able to generate an inflammatory response in the whole area to clear the virus.” Working with HIV patients, “I see sheets and sheets of confluent warts throughout the whole genital area; to try to freeze that is impossible. Now I have a way to get rid of [genital] warts and keep them away even if you have a big cluster,” she said.
“Sometimes, we’ll do both liquid nitrogen and imiquimod. That’s a good way to tackle people who have a high burden of warts,” Dr. Kovarik noted. Other effective treatments have come out as well, including an ointment formulation of sinecatechins, extracted from green tea, “but you have to put it on several times a day, and insurance companies don’t cover it often,” she said.
Intralesional cidofovir is also proving to be boon for potentially malignant refractory warts in HIV and transplant patients. “It’s an incredible treatment. We can inject that antiviral into warts and get rid of them. We finally found something that helps” these people, Dr. Kovarik said.
The HPV vaccine Gardasil is making a difference, as well. In addition to cervical dysplasia and anogenital cancers, it protects against two condyloma strains. Dr. Rosen said he’s seeing fewer cases of genital warts now than when he started practicing, likely because of the vaccine.
“Organisms that weren’t pathogens are now pathogens”
Antibiotic resistance probably tops the list for what’s changed in a bad way in ID dermatology since 1970. Dr. Rosen remembers at the start of his career that “we never worried about antibiotic resistance. We’d put people on antibiotics for acne, rosacea, and we’d keep them on them for 3 years, 6 years”; resistance wasn’t on the radar screen and was not mentioned once in the first issue of Dermatology News, which was packed with articles and ran 24 pages.
The situation is different now. Driven by decades of overuse in agriculture and the medical system, antibiotic resistance is a concern throughout medicine, and unfortunately, “we have not come nearly as far as fast with antibiotics,” at least the ones dermatologists use, “as we have with antivirals,” Dr. Tyring said.
For instance, methicillin-resistant Staphylococcus aureus (MRSA), first described in the United States in 1968, is “no longer the exception to the rule, but the rule” itself, he said, with carbuncles, furuncles, and abscesses not infrequently growing out MRSA. There are also new drug-resistant forms of old problems like gonorrhea and tuberculosis, among other developments, and impetigo has shifted since 1970 from mostly a Streptococcus infection easily treated with penicillin to often a Staphylococcus disease that’s resistant to it. There’s also been a steady march of new pathogens, including the latest one, SARS-CoV-2, the virus that causes COVID-19, which has been recognized as having a variety of skin manifestations.
“No matter how smart we think we are, nature has a way of putting us back in our place,” Dr. Rosen said.
The bright spot is that “we’ve become very adept at identifying and characterizing” microbes “based on techniques we didn’t even have when I started practicing,” such as polymerase chain reaction. “It has taken a lot of guess work out of treating infectious diseases,” he said.
The widespread use of immunosuppressives such as cyclophosphamide, mycophenolate, azathioprine, rituximab, and other agents used in conjunction with solid organ transplantation, has also been a challenge. “We are seeing infections with really odd organisms. Just recently, I had a patient with fusarium in the skin; it’s a fungus that lives in the dirt. I saw a patient with a species of algae” that normally lives in stagnant water, he commented. “We used to get [things like that] back on reports, and we’d throw them away. You can’t do that anymore. Organisms that weren’t pathogens in the past are now pathogens,” particularly in immunosuppressed people, Dr. Rosen said.
Venereologists no more
There’s been another big change in the field. “Back in the not too distant past, dermatologists in the U.S. were referred to as ‘dermatologist-venereologists.’ ” It goes back to the time when syphilis wasn’t diagnosed and treated early, so patients often presented with secondary skin complications and went to dermatologists for help. As a result, “dermatologists became the most experienced at treating it,” Dr. Tyring said.
That’s faded from practice. Part of the reason is that as late as 2000, syphilis seemed to be on the way out; the Centers for Disease and Control and Prevention even raised the possibility of elimination. Dermatologists turned their attention to other areas.
It might have been short-sighted, Dr. Rosen said. Syphilis has made a strong comeback, and drug-resistant gonorrhea has also emerged globally and in at least a few states. No other medical field has stepped in to take up the slack. “Ob.gyns. are busy delivering babies, ID [physicians are] concerned about HIV, and urologists are worried about kidney stones and cancer.” Other than herpes and genital warts, “we have not done well” with management of sexually transmitted diseases, he said.
“I could sense” his frustration
The first issue of Dermatology News carried an article and photospread about scabies that could run today, except that topical permethrin and oral ivermectin have largely replaced benzyl benzoate and sulfur ointments for treatment in the United States. In the article, Scottish dermatologist J. O’D. Alexander, MD, called scabies “the scourge of mankind” and blamed it’s prevalence on “an offhand attitude to the disease which makes control very difficult.”
“I could sense this man’s frustration that people were not recognizing scabies,” Dr. Kovarik said, and it’s no closer to being eradicated than it was in 1970. “It’s still around, and we see it in our clinics. It’s a horrible disease in kids we see in dermatology not infrequently,” and treatment has only advanced a bit.
The article highlights what hasn’t changed much in ID dermatology over the years. Common warts are another one. “With all the evolution in medicine, we don’t have any better treatments approved for common warts than we ever had.” Injecting cidofovir “works great,” but access is a problem, Dr. Tyring said.
Onychomycosis has also proven a tough nut to crack. Readers back in 1970 counted the introduction of the antifungal, griseofulvin, as a major advancement in the 1960s; it’s still a go-to for tinea capitis, but it didn’t work very well for toenail fungus. Terbinafine (Lamisil), approved in 1993, and subsequent developments have helped, but the field still awaits more effective options; a few potential new agents are in the pipeline.
Although there have been major advancements for serious systemic fungal infections, “we’ve mainly seen small steps forward” in ID dermatology, Dr. Tyring said.
Dr. Tyring, Dr. Kovarik, and Dr. Rosen said they had no relevant disclosures.
FMT may improve outcomes without clearing multidrug-resistant organisms
For seriously ill patients with multidrug-resistant organisms (MDROs) in their gastrointestinal tract, performing a fecal microbiota transplant (FMT) may result in fewer and less severe infections, as well as shorter hospital stays, according to investigators.
Significant clinical improvements were observed across the group even though 59% of patients did not clear MDROs, which suggests that complete decolonization of resistant organisms may be unnecessary for patients to benefit from FMT, reported lead author Julian Marchesi, PhD, of Cardiff (Wales) University and Imperial College London (England).
“We see the quality of life for these patients is hugely improved even when we don’t get rid of the organism totally,” Dr. Marchesi said in a virtual press conference.
Although previous studies have suggested that FMT may be used to decolonize MDROs, little research has addressed other clinical outcomes, the investigators wrote in an abstract released as part of the annual Digestive Disease Week®, which was canceled because of COVID-19.
The present study involved 20 patients with MDROs, including extended-spectrum beta-lactamase Enterobacteriaceae (ESBL), carbapenemase-producing Enterobacteriaceae (CPE), or vancomycin-resistant enterococci (VRE). Approximately half of the population (n = 11) had chronic hematological disease. The other half (n = 9) had recurrent urinary tract infections with ESBL, including patients who had undergone renal transplant or had recurrent Clostridioides difficile infection.
For each transplant, 200-300 mL of fecal slurry was delivered via nasogastric tube into the small intestine. Fecal donors underwent a strict screening process that included blood, fecal, and behavioral testing.
Multiple clinical outcomes were evaluated in the 6 months leading up to FMT, then compared with outcomes in the 6 months following fecal transplant. Out of 20 patients, 17 completed the 6-month follow-up. Although only 7 of these patients (41%) were decolonized of MDROs, multiple significant clinical improvements were observed across the group, including reductions in MDRO bloodstream infections (P = .047), all bloodstream infections (P = .03), length of stay in hospital (P = .0002), and duration of carbapenem use (P = .0005). Eight out of 11 patients with hematologic disease improved enough to undergo stem cell transplantation within 6 months of FMT, and in the subgroup of patients who had undergone renal transplant, the rate of urinary tract infections was significantly improved (P = .008).
No serious adverse events were encountered during the trial, which led the investigators to conclude that FMT was safe and well tolerated, even in patients with bloodstream infections and those who were highly immunosuppressed.
Beyond clinical implications, Dr. Marchesi suggested that the study findings should influence FMT trial methodology.
“We’ve got to start thinking a little bit differently in terms of how we measure the impact of FMT,” he said. “It’s not all about ... getting rid of these opportunistic pathogens. There are other quality-of-life factors that we need to measure, because they’re also important for the patient.”
Dr. Marchesi said that more research is needed to confirm findings and gain a mechanistic understanding of why patients may improve despite a lack of decolonization.
“We think we’re on a strong foundation here to take this into a clinical trial,” he said.
The research was funded by the National Institute for Health Research and the Medical Research Council. The investigators reported no conflicts of interest.
For seriously ill patients with multidrug-resistant organisms (MDROs) in their gastrointestinal tract, performing a fecal microbiota transplant (FMT) may result in fewer and less severe infections, as well as shorter hospital stays, according to investigators.
Significant clinical improvements were observed across the group even though 59% of patients did not clear MDROs, which suggests that complete decolonization of resistant organisms may be unnecessary for patients to benefit from FMT, reported lead author Julian Marchesi, PhD, of Cardiff (Wales) University and Imperial College London (England).
“We see the quality of life for these patients is hugely improved even when we don’t get rid of the organism totally,” Dr. Marchesi said in a virtual press conference.
Although previous studies have suggested that FMT may be used to decolonize MDROs, little research has addressed other clinical outcomes, the investigators wrote in an abstract released as part of the annual Digestive Disease Week®, which was canceled because of COVID-19.
The present study involved 20 patients with MDROs, including extended-spectrum beta-lactamase Enterobacteriaceae (ESBL), carbapenemase-producing Enterobacteriaceae (CPE), or vancomycin-resistant enterococci (VRE). Approximately half of the population (n = 11) had chronic hematological disease. The other half (n = 9) had recurrent urinary tract infections with ESBL, including patients who had undergone renal transplant or had recurrent Clostridioides difficile infection.
For each transplant, 200-300 mL of fecal slurry was delivered via nasogastric tube into the small intestine. Fecal donors underwent a strict screening process that included blood, fecal, and behavioral testing.
Multiple clinical outcomes were evaluated in the 6 months leading up to FMT, then compared with outcomes in the 6 months following fecal transplant. Out of 20 patients, 17 completed the 6-month follow-up. Although only 7 of these patients (41%) were decolonized of MDROs, multiple significant clinical improvements were observed across the group, including reductions in MDRO bloodstream infections (P = .047), all bloodstream infections (P = .03), length of stay in hospital (P = .0002), and duration of carbapenem use (P = .0005). Eight out of 11 patients with hematologic disease improved enough to undergo stem cell transplantation within 6 months of FMT, and in the subgroup of patients who had undergone renal transplant, the rate of urinary tract infections was significantly improved (P = .008).
No serious adverse events were encountered during the trial, which led the investigators to conclude that FMT was safe and well tolerated, even in patients with bloodstream infections and those who were highly immunosuppressed.
Beyond clinical implications, Dr. Marchesi suggested that the study findings should influence FMT trial methodology.
“We’ve got to start thinking a little bit differently in terms of how we measure the impact of FMT,” he said. “It’s not all about ... getting rid of these opportunistic pathogens. There are other quality-of-life factors that we need to measure, because they’re also important for the patient.”
Dr. Marchesi said that more research is needed to confirm findings and gain a mechanistic understanding of why patients may improve despite a lack of decolonization.
“We think we’re on a strong foundation here to take this into a clinical trial,” he said.
The research was funded by the National Institute for Health Research and the Medical Research Council. The investigators reported no conflicts of interest.
For seriously ill patients with multidrug-resistant organisms (MDROs) in their gastrointestinal tract, performing a fecal microbiota transplant (FMT) may result in fewer and less severe infections, as well as shorter hospital stays, according to investigators.
Significant clinical improvements were observed across the group even though 59% of patients did not clear MDROs, which suggests that complete decolonization of resistant organisms may be unnecessary for patients to benefit from FMT, reported lead author Julian Marchesi, PhD, of Cardiff (Wales) University and Imperial College London (England).
“We see the quality of life for these patients is hugely improved even when we don’t get rid of the organism totally,” Dr. Marchesi said in a virtual press conference.
Although previous studies have suggested that FMT may be used to decolonize MDROs, little research has addressed other clinical outcomes, the investigators wrote in an abstract released as part of the annual Digestive Disease Week®, which was canceled because of COVID-19.
The present study involved 20 patients with MDROs, including extended-spectrum beta-lactamase Enterobacteriaceae (ESBL), carbapenemase-producing Enterobacteriaceae (CPE), or vancomycin-resistant enterococci (VRE). Approximately half of the population (n = 11) had chronic hematological disease. The other half (n = 9) had recurrent urinary tract infections with ESBL, including patients who had undergone renal transplant or had recurrent Clostridioides difficile infection.
For each transplant, 200-300 mL of fecal slurry was delivered via nasogastric tube into the small intestine. Fecal donors underwent a strict screening process that included blood, fecal, and behavioral testing.
Multiple clinical outcomes were evaluated in the 6 months leading up to FMT, then compared with outcomes in the 6 months following fecal transplant. Out of 20 patients, 17 completed the 6-month follow-up. Although only 7 of these patients (41%) were decolonized of MDROs, multiple significant clinical improvements were observed across the group, including reductions in MDRO bloodstream infections (P = .047), all bloodstream infections (P = .03), length of stay in hospital (P = .0002), and duration of carbapenem use (P = .0005). Eight out of 11 patients with hematologic disease improved enough to undergo stem cell transplantation within 6 months of FMT, and in the subgroup of patients who had undergone renal transplant, the rate of urinary tract infections was significantly improved (P = .008).
No serious adverse events were encountered during the trial, which led the investigators to conclude that FMT was safe and well tolerated, even in patients with bloodstream infections and those who were highly immunosuppressed.
Beyond clinical implications, Dr. Marchesi suggested that the study findings should influence FMT trial methodology.
“We’ve got to start thinking a little bit differently in terms of how we measure the impact of FMT,” he said. “It’s not all about ... getting rid of these opportunistic pathogens. There are other quality-of-life factors that we need to measure, because they’re also important for the patient.”
Dr. Marchesi said that more research is needed to confirm findings and gain a mechanistic understanding of why patients may improve despite a lack of decolonization.
“We think we’re on a strong foundation here to take this into a clinical trial,” he said.
The research was funded by the National Institute for Health Research and the Medical Research Council. The investigators reported no conflicts of interest.
FROM DDW 2020
Antibiotic resistance rises among pneumococcus strains in kids
Antibiotic resistance in strains of Streptococcus pneumoniae has been rising since 2013 because of changing susceptibility profiles, based on data from 1,201 isolates collected from 448 children in primary care settings.
“New strains expressing capsular serotypes not included in the 13-valent pneumococcal conjugate vaccine are emerging to cause disease, and strains that acquire antibiotic resistance are increasing in frequency due to their survival of the fittest advantage,” wrote Ravinder Kaur, PhD, of Rochester (N.Y.) General Hospital Research Institute, and colleagues.
Similar Darwinian principles occurred after the introduction of PCV-7, the study authors added.
In a prospective cohort study published in Clinical Infectious Diseases, the researchers reviewed 1,201 isolates collected from the nasopharynx during healthy periods, and from the nasopharynx and middle ear fluid (MEF) during episodes of acute otitis media, in children aged 6-36 months who were seen in primary care settings.
The isolates were collected during 2006-2016 to reflect the pre- and post-PCV13 era. Children received PCV-7 from 2006 until April 2010, and received PCV-13 after April 2010.
Overall, the number of acute otitis media (AOM) cases caused by S. pneumoniae was not significantly different between the PCV-7 and PCV-13 eras, nor was the frequency of pneumococci identified in the nasopharynx during healthy visits and visits at the start of an AOM infection.
The researchers examined susceptibility using minimum inhibitory concentrations (MIC). During healthy visits, the MIC50 of isolated pneumococci was low (no greater than 0.06 mcg/mL) for all four beta-lactam drugs tested. And it didn’t change significantly over the study years.
In contrast, among the nasopharyngeal and MEF isolates during AOM, the MIC50 to penicillin, amoxicillin, ceftriaxone, and meropenem during 2013-2016 rose significantly, the investigators said.
A change in antibiotic susceptibility within a subtype also contributed to the development of PCV-13 resistance.
The study authors identified three serotypes that affected the changes in susceptibility in their study population. Serotypes 35B and 35F increased their beta-lactam resistance during 2013-2016, and serotype 11A had a higher MIC to quinolones and became more prevalent during 2013-2016. Those three serotypes accounted for most of the change in antibiotic susceptibility, the researchers said.
In addition, “the frequency of strains resistant to penicillin and amoxicillin decreased with the introduction of PCV-13, but rebounded to levels similar to those before PCV-13 introduction by 2015-2016,” the investigators noted.
The study findings were limited by several factors, including the homogeneous study population and potential lack of generalizability to other settings. In addition, the researchers did not study antibiotic consumption or antibiotic treatment failure, and they could not account for potential AOM cases that may have been treated in settings other than primary care.
However, the investigators said the results support the need for additional studies and attention to the development of the next generation of PCVs, the PCV-15 and PCV-20. Both include serotypes 22F and 33F, but neither includes 35B or 35F. The PCV-20 also includes 11A and 15B.
The study was supported in part by the National Institutes of Health and Sanofi Pasteur. Some isolates collected during the 2010-2013 time period were part of a study supported by Pfizer. The researchers had no relevant financial conflicts to disclose.
SOURCE: Kaur R et al. Clin Inf Dis. 2020 Feb 18. doi: 10.1093/cid/ciaa157.
Dr. Kaur and colleagues report their analysis of pneumococcal resistance among nasopharyngeal and middle ear isolates (90% nasopharyngeal and 10% middle ear) collected between 2008 and 2016. They demonstrate the dominant role that nonvaccine serotypes play in carriage and acute otitis media (AOM) in children, and by extension potentially the entire spectrum of pneumococcal disease in the 13-valent pneumococcal conjugate vaccine (PCV13) era. Nonsusceptibility to beta-lactams was reported for one-third of isolates with the increase in the most recent reported years (2013-2016).
What are the implications for treatment of pneumococcal infections? For AOM, amoxicillin minimum inhibitory concentrations (MIC) were all less than 4 mcg/mL, which is the pharmacodynamic breakpoint for high-dose (90 mg/kg per day) AOM regimens; these data support continued use of high-dose amoxicillin for children with AOM that requires antimicrobial treatment. Resistance to macrolides (erythromycin and likely azithromycin) occurred in approximately one-third of isolates; however, in contrast to beta-lactams (amoxicillin), higher macrolide doses do not overcome resistance. Thus macrolide use for AOM appears limited to those with beta-lactam allergy and no better alternative drug, i.e., expect failure in one-third of AOM patients if macrolides are used. For ceftriaxone, no 2013-2016 isolate had a MIC over 0.5 mcg/mL, implying that ceftriaxone remains appropriate first-line therapy for serious pneumococcal disease and effective for pneumococcal AOM when oral drugs have failed or are not an option because of repeated emesis. Interestingly, trimethoprim/sulfamethoxazole (T/S) had lower resistance rates against the nonvaccine “bad boy” serogroup 35 (8%-15%), compared with cephalosporins (32%-57%). Perhaps we are back to the future and T/S will again have a role against pneumococcal AOM. Of note, no isolate was resistant to levofloxacin or linezolid. Linezolid or macrolide use alone must be considered with the caveat that nontypeable Haemophilus influenzae now likely surpasses pneumococcus as an AOM pathogen, and neither drug class is active against nontypeable H. influenzae.
What are the implications for prevention? This is one of many studies in the post-PCV era reporting serotype replacement with nonvaccine serotypes. But most prior studies reported reduced overall disease burden; in other words, the absolute number of pneumococcal infections was reduced, but residual AOM nonvaccine types dominated as the etiology. The current study, however, suggests that the overall number of AOM episodes may not be less because increases in AOM caused by nonvaccine serotypes may be offsetting declines in AOM caused by vaccine serotypes. This concept contrasts to multiple large epidemiologic studies demonstrating a decline in overall incidence of AOM office visits/episodes and several Israeli studies reporting a decline in pneumococcal AOM in children who warrant tympanocentesis. These new data are food for thought, but antibiotic resistance can vary regionally, so confirmation based on data from other regions seems warranted.
Next-generation vaccines will need to consider which serotypes are prevalent in pneumococcal disease, including AOM, as we continue into the PCV13 era. However, serotypes causing invasive pneumococcal disease and pneumonia would be higher priorities than AOM. Indeed, several candidate PCV vaccines are currently in clinical trials adding up to seven serotypes, including most of the newly emerging invasive disease serotypes. One downside to the newer PCVs is lack of serogroup 35, a prominent culprit in AOM resistance in the current report.
Stephen I. Pelton, MD, is professor of pediatrics and epidemiology at Boston University and senior attending physician at Boston Medical Center. Christopher J. Harrison, MD, is professor of pediatrics and pediatric infectious diseases at Children’s Mercy Hospital–Kansas City, Mo. Dr. Pelton has received honorarium from Merck Vaccines, Pfizer, and Sanofi for participation in advisory board meeting on pneumococcal vaccine and/or membership on the Data and Safety Monitoring Board. Boston Medical Center has received investigator-initiated research grants from Merck Vaccines and Pfizer.
Children’s Mercy Hospital – Kansas City Boston Medical Center has received funding from GlaxoSmithKline, Merck, and Pfizer for research vaccine studies, and from Pfizer and Merck for investigator-initiated research grants for in vitro pneumococcal investigations on which Dr. Harrison is an investigator.
Dr. Kaur and colleagues report their analysis of pneumococcal resistance among nasopharyngeal and middle ear isolates (90% nasopharyngeal and 10% middle ear) collected between 2008 and 2016. They demonstrate the dominant role that nonvaccine serotypes play in carriage and acute otitis media (AOM) in children, and by extension potentially the entire spectrum of pneumococcal disease in the 13-valent pneumococcal conjugate vaccine (PCV13) era. Nonsusceptibility to beta-lactams was reported for one-third of isolates with the increase in the most recent reported years (2013-2016).
What are the implications for treatment of pneumococcal infections? For AOM, amoxicillin minimum inhibitory concentrations (MIC) were all less than 4 mcg/mL, which is the pharmacodynamic breakpoint for high-dose (90 mg/kg per day) AOM regimens; these data support continued use of high-dose amoxicillin for children with AOM that requires antimicrobial treatment. Resistance to macrolides (erythromycin and likely azithromycin) occurred in approximately one-third of isolates; however, in contrast to beta-lactams (amoxicillin), higher macrolide doses do not overcome resistance. Thus macrolide use for AOM appears limited to those with beta-lactam allergy and no better alternative drug, i.e., expect failure in one-third of AOM patients if macrolides are used. For ceftriaxone, no 2013-2016 isolate had a MIC over 0.5 mcg/mL, implying that ceftriaxone remains appropriate first-line therapy for serious pneumococcal disease and effective for pneumococcal AOM when oral drugs have failed or are not an option because of repeated emesis. Interestingly, trimethoprim/sulfamethoxazole (T/S) had lower resistance rates against the nonvaccine “bad boy” serogroup 35 (8%-15%), compared with cephalosporins (32%-57%). Perhaps we are back to the future and T/S will again have a role against pneumococcal AOM. Of note, no isolate was resistant to levofloxacin or linezolid. Linezolid or macrolide use alone must be considered with the caveat that nontypeable Haemophilus influenzae now likely surpasses pneumococcus as an AOM pathogen, and neither drug class is active against nontypeable H. influenzae.
What are the implications for prevention? This is one of many studies in the post-PCV era reporting serotype replacement with nonvaccine serotypes. But most prior studies reported reduced overall disease burden; in other words, the absolute number of pneumococcal infections was reduced, but residual AOM nonvaccine types dominated as the etiology. The current study, however, suggests that the overall number of AOM episodes may not be less because increases in AOM caused by nonvaccine serotypes may be offsetting declines in AOM caused by vaccine serotypes. This concept contrasts to multiple large epidemiologic studies demonstrating a decline in overall incidence of AOM office visits/episodes and several Israeli studies reporting a decline in pneumococcal AOM in children who warrant tympanocentesis. These new data are food for thought, but antibiotic resistance can vary regionally, so confirmation based on data from other regions seems warranted.
Next-generation vaccines will need to consider which serotypes are prevalent in pneumococcal disease, including AOM, as we continue into the PCV13 era. However, serotypes causing invasive pneumococcal disease and pneumonia would be higher priorities than AOM. Indeed, several candidate PCV vaccines are currently in clinical trials adding up to seven serotypes, including most of the newly emerging invasive disease serotypes. One downside to the newer PCVs is lack of serogroup 35, a prominent culprit in AOM resistance in the current report.
Stephen I. Pelton, MD, is professor of pediatrics and epidemiology at Boston University and senior attending physician at Boston Medical Center. Christopher J. Harrison, MD, is professor of pediatrics and pediatric infectious diseases at Children’s Mercy Hospital–Kansas City, Mo. Dr. Pelton has received honorarium from Merck Vaccines, Pfizer, and Sanofi for participation in advisory board meeting on pneumococcal vaccine and/or membership on the Data and Safety Monitoring Board. Boston Medical Center has received investigator-initiated research grants from Merck Vaccines and Pfizer.
Children’s Mercy Hospital – Kansas City Boston Medical Center has received funding from GlaxoSmithKline, Merck, and Pfizer for research vaccine studies, and from Pfizer and Merck for investigator-initiated research grants for in vitro pneumococcal investigations on which Dr. Harrison is an investigator.
Dr. Kaur and colleagues report their analysis of pneumococcal resistance among nasopharyngeal and middle ear isolates (90% nasopharyngeal and 10% middle ear) collected between 2008 and 2016. They demonstrate the dominant role that nonvaccine serotypes play in carriage and acute otitis media (AOM) in children, and by extension potentially the entire spectrum of pneumococcal disease in the 13-valent pneumococcal conjugate vaccine (PCV13) era. Nonsusceptibility to beta-lactams was reported for one-third of isolates with the increase in the most recent reported years (2013-2016).
What are the implications for treatment of pneumococcal infections? For AOM, amoxicillin minimum inhibitory concentrations (MIC) were all less than 4 mcg/mL, which is the pharmacodynamic breakpoint for high-dose (90 mg/kg per day) AOM regimens; these data support continued use of high-dose amoxicillin for children with AOM that requires antimicrobial treatment. Resistance to macrolides (erythromycin and likely azithromycin) occurred in approximately one-third of isolates; however, in contrast to beta-lactams (amoxicillin), higher macrolide doses do not overcome resistance. Thus macrolide use for AOM appears limited to those with beta-lactam allergy and no better alternative drug, i.e., expect failure in one-third of AOM patients if macrolides are used. For ceftriaxone, no 2013-2016 isolate had a MIC over 0.5 mcg/mL, implying that ceftriaxone remains appropriate first-line therapy for serious pneumococcal disease and effective for pneumococcal AOM when oral drugs have failed or are not an option because of repeated emesis. Interestingly, trimethoprim/sulfamethoxazole (T/S) had lower resistance rates against the nonvaccine “bad boy” serogroup 35 (8%-15%), compared with cephalosporins (32%-57%). Perhaps we are back to the future and T/S will again have a role against pneumococcal AOM. Of note, no isolate was resistant to levofloxacin or linezolid. Linezolid or macrolide use alone must be considered with the caveat that nontypeable Haemophilus influenzae now likely surpasses pneumococcus as an AOM pathogen, and neither drug class is active against nontypeable H. influenzae.
What are the implications for prevention? This is one of many studies in the post-PCV era reporting serotype replacement with nonvaccine serotypes. But most prior studies reported reduced overall disease burden; in other words, the absolute number of pneumococcal infections was reduced, but residual AOM nonvaccine types dominated as the etiology. The current study, however, suggests that the overall number of AOM episodes may not be less because increases in AOM caused by nonvaccine serotypes may be offsetting declines in AOM caused by vaccine serotypes. This concept contrasts to multiple large epidemiologic studies demonstrating a decline in overall incidence of AOM office visits/episodes and several Israeli studies reporting a decline in pneumococcal AOM in children who warrant tympanocentesis. These new data are food for thought, but antibiotic resistance can vary regionally, so confirmation based on data from other regions seems warranted.
Next-generation vaccines will need to consider which serotypes are prevalent in pneumococcal disease, including AOM, as we continue into the PCV13 era. However, serotypes causing invasive pneumococcal disease and pneumonia would be higher priorities than AOM. Indeed, several candidate PCV vaccines are currently in clinical trials adding up to seven serotypes, including most of the newly emerging invasive disease serotypes. One downside to the newer PCVs is lack of serogroup 35, a prominent culprit in AOM resistance in the current report.
Stephen I. Pelton, MD, is professor of pediatrics and epidemiology at Boston University and senior attending physician at Boston Medical Center. Christopher J. Harrison, MD, is professor of pediatrics and pediatric infectious diseases at Children’s Mercy Hospital–Kansas City, Mo. Dr. Pelton has received honorarium from Merck Vaccines, Pfizer, and Sanofi for participation in advisory board meeting on pneumococcal vaccine and/or membership on the Data and Safety Monitoring Board. Boston Medical Center has received investigator-initiated research grants from Merck Vaccines and Pfizer.
Children’s Mercy Hospital – Kansas City Boston Medical Center has received funding from GlaxoSmithKline, Merck, and Pfizer for research vaccine studies, and from Pfizer and Merck for investigator-initiated research grants for in vitro pneumococcal investigations on which Dr. Harrison is an investigator.
Antibiotic resistance in strains of Streptococcus pneumoniae has been rising since 2013 because of changing susceptibility profiles, based on data from 1,201 isolates collected from 448 children in primary care settings.
“New strains expressing capsular serotypes not included in the 13-valent pneumococcal conjugate vaccine are emerging to cause disease, and strains that acquire antibiotic resistance are increasing in frequency due to their survival of the fittest advantage,” wrote Ravinder Kaur, PhD, of Rochester (N.Y.) General Hospital Research Institute, and colleagues.
Similar Darwinian principles occurred after the introduction of PCV-7, the study authors added.
In a prospective cohort study published in Clinical Infectious Diseases, the researchers reviewed 1,201 isolates collected from the nasopharynx during healthy periods, and from the nasopharynx and middle ear fluid (MEF) during episodes of acute otitis media, in children aged 6-36 months who were seen in primary care settings.
The isolates were collected during 2006-2016 to reflect the pre- and post-PCV13 era. Children received PCV-7 from 2006 until April 2010, and received PCV-13 after April 2010.
Overall, the number of acute otitis media (AOM) cases caused by S. pneumoniae was not significantly different between the PCV-7 and PCV-13 eras, nor was the frequency of pneumococci identified in the nasopharynx during healthy visits and visits at the start of an AOM infection.
The researchers examined susceptibility using minimum inhibitory concentrations (MIC). During healthy visits, the MIC50 of isolated pneumococci was low (no greater than 0.06 mcg/mL) for all four beta-lactam drugs tested. And it didn’t change significantly over the study years.
In contrast, among the nasopharyngeal and MEF isolates during AOM, the MIC50 to penicillin, amoxicillin, ceftriaxone, and meropenem during 2013-2016 rose significantly, the investigators said.
A change in antibiotic susceptibility within a subtype also contributed to the development of PCV-13 resistance.
The study authors identified three serotypes that affected the changes in susceptibility in their study population. Serotypes 35B and 35F increased their beta-lactam resistance during 2013-2016, and serotype 11A had a higher MIC to quinolones and became more prevalent during 2013-2016. Those three serotypes accounted for most of the change in antibiotic susceptibility, the researchers said.
In addition, “the frequency of strains resistant to penicillin and amoxicillin decreased with the introduction of PCV-13, but rebounded to levels similar to those before PCV-13 introduction by 2015-2016,” the investigators noted.
The study findings were limited by several factors, including the homogeneous study population and potential lack of generalizability to other settings. In addition, the researchers did not study antibiotic consumption or antibiotic treatment failure, and they could not account for potential AOM cases that may have been treated in settings other than primary care.
However, the investigators said the results support the need for additional studies and attention to the development of the next generation of PCVs, the PCV-15 and PCV-20. Both include serotypes 22F and 33F, but neither includes 35B or 35F. The PCV-20 also includes 11A and 15B.
The study was supported in part by the National Institutes of Health and Sanofi Pasteur. Some isolates collected during the 2010-2013 time period were part of a study supported by Pfizer. The researchers had no relevant financial conflicts to disclose.
SOURCE: Kaur R et al. Clin Inf Dis. 2020 Feb 18. doi: 10.1093/cid/ciaa157.
Antibiotic resistance in strains of Streptococcus pneumoniae has been rising since 2013 because of changing susceptibility profiles, based on data from 1,201 isolates collected from 448 children in primary care settings.
“New strains expressing capsular serotypes not included in the 13-valent pneumococcal conjugate vaccine are emerging to cause disease, and strains that acquire antibiotic resistance are increasing in frequency due to their survival of the fittest advantage,” wrote Ravinder Kaur, PhD, of Rochester (N.Y.) General Hospital Research Institute, and colleagues.
Similar Darwinian principles occurred after the introduction of PCV-7, the study authors added.
In a prospective cohort study published in Clinical Infectious Diseases, the researchers reviewed 1,201 isolates collected from the nasopharynx during healthy periods, and from the nasopharynx and middle ear fluid (MEF) during episodes of acute otitis media, in children aged 6-36 months who were seen in primary care settings.
The isolates were collected during 2006-2016 to reflect the pre- and post-PCV13 era. Children received PCV-7 from 2006 until April 2010, and received PCV-13 after April 2010.
Overall, the number of acute otitis media (AOM) cases caused by S. pneumoniae was not significantly different between the PCV-7 and PCV-13 eras, nor was the frequency of pneumococci identified in the nasopharynx during healthy visits and visits at the start of an AOM infection.
The researchers examined susceptibility using minimum inhibitory concentrations (MIC). During healthy visits, the MIC50 of isolated pneumococci was low (no greater than 0.06 mcg/mL) for all four beta-lactam drugs tested. And it didn’t change significantly over the study years.
In contrast, among the nasopharyngeal and MEF isolates during AOM, the MIC50 to penicillin, amoxicillin, ceftriaxone, and meropenem during 2013-2016 rose significantly, the investigators said.
A change in antibiotic susceptibility within a subtype also contributed to the development of PCV-13 resistance.
The study authors identified three serotypes that affected the changes in susceptibility in their study population. Serotypes 35B and 35F increased their beta-lactam resistance during 2013-2016, and serotype 11A had a higher MIC to quinolones and became more prevalent during 2013-2016. Those three serotypes accounted for most of the change in antibiotic susceptibility, the researchers said.
In addition, “the frequency of strains resistant to penicillin and amoxicillin decreased with the introduction of PCV-13, but rebounded to levels similar to those before PCV-13 introduction by 2015-2016,” the investigators noted.
The study findings were limited by several factors, including the homogeneous study population and potential lack of generalizability to other settings. In addition, the researchers did not study antibiotic consumption or antibiotic treatment failure, and they could not account for potential AOM cases that may have been treated in settings other than primary care.
However, the investigators said the results support the need for additional studies and attention to the development of the next generation of PCVs, the PCV-15 and PCV-20. Both include serotypes 22F and 33F, but neither includes 35B or 35F. The PCV-20 also includes 11A and 15B.
The study was supported in part by the National Institutes of Health and Sanofi Pasteur. Some isolates collected during the 2010-2013 time period were part of a study supported by Pfizer. The researchers had no relevant financial conflicts to disclose.
SOURCE: Kaur R et al. Clin Inf Dis. 2020 Feb 18. doi: 10.1093/cid/ciaa157.
FROM CLINICAL INFECTIOUS DISEASES
Children with resistant UTIs unexpectedly may respond to discordant antibiotics
Children with urinary tract infections (UTIs) may improve clinically, and pyuria may resolve, during empiric treatment with an antibiotic that turns out to be discordant, according a retrospective study in Pediatrics.
“The low rate of care escalation and high rate of clinical improvement while on discordant antibiotics suggests that, for most patients, it would be reasonable to continue current empiric antibiotic practices until urine culture sensitivities return,” said first author Marie E. Wang, MD, a pediatric hospitalist at Stanford (Calif.) University, and colleagues.
The researchers examined the initial clinical response and escalation of care for 316 children with UTIs who received therapy to which the infecting isolate was not susceptible. The study included patients who had infections that were resistant to third-generation cephalosporins – that is, urinalysis found that the infections were not susceptible to ceftriaxone or cefotaxime in vitro. Before the resistant organisms were identified, however, the patients were started on discordant antibiotics.
Escalation of care was uncommon
The patients had a median age of 2.4 years, and 78% were girls. Approximately 90% were started on a cephalosporin, and about 65% received a first-generation cephalosporin. Patients presented during 2012-2017 to one of five children’s hospitals or to a large managed care organization with 10 hospitals in the United States. The investigators defined care escalation as a visit to the emergency department, hospitalization, or transfer to the ICU.
In all, seven patients (2%) had escalation of care on discordant antibiotics. Four children visited an emergency department without hospitalization, and three children were hospitalized because of persistent symptoms.
Among 230 cases for which the researchers had data about clinical response at a median follow-up of 3 days, 84% “had overall clinical improvement while on discordant antibiotics,” the authors said.
For 22 children who had repeat urine testing while on discordant antibiotics, 53% had resolution of pyuria, and 32% had improvement of pyuria, whereas 16% did not have improvement. Of the three patients without improvement, one had no change, and two had worsening.
Of 17 patients who had a repeat urine culture on discordant therapy, 65% had a negative repeat culture, and 18% grew the same pathogen with a decreased colony count. Two patients had a colony count that remained unchanged, and one patient had an increased colony count.
Small studies outside the United States have reported similar results, the researchers noted. Spontaneous resolution of UTIs or antibiotics reaching a sufficient concentration in the urine and renal parenchyma to achieve a clinical response are possible explanations for the findings, they wrote.
“Few children required escalation of care and most experienced initial clinical improvement,” noted Dr. Wang and colleagues. “Furthermore, in the small group of children that underwent repeat urine testing while on discordant therapy, most had resolution or improvement in pyuria and sterilization of their urine cultures. Our findings suggest that Additionally, given that these patients initially received what would generally be considered inadequate treatment, our findings may provide some insight into the natural history of UTIs and/or trigger further investigation into the relationship between in vitro urine culture susceptibilities and in vivo clinical response to treatment.”
‘Caution is needed’
The study “highlights an intriguing observation about children with UTIs unexpectedly responding to discordant antibiotic therapy,” Tej K. Mattoo, MD, and Basim I. Asmar, MD, wrote in an accompanying commentary.(doi: 10.1542/peds.2019-3512). Dr. Mattoo and Dr. Asmar, a pediatric nephrologist and a specialist in pediatric infectious diseases, respectively, at Wayne State University and affiliated with Children’s Hospital of Michigan, both in Detroit.
In an inpatient setting, it may be easy for physicians to reassess patients “once urine culture results reveal resistance to the treating antibiotic,” they noted. In an ambulatory setting, however, “it is likely that some patients will receive a full course of an antibiotic that does not have in vitro activity against the urinary pathogen.”
Physicians have a responsibility to use antibiotics judiciously, they said. Widely accepted principles include avoiding repeated courses of antibiotics, diagnosing UTIs appropriately, and not treating asymptomatic bacteriuria.
The study had no external funding. The authors had no relevant financial disclosures.
SOURCE: Wang ME et al. Pediatrics. 2020 Jan 17. doi: 10.1542/peds.2019-1608.
This article was updated 2/4/2020.
Children with urinary tract infections (UTIs) may improve clinically, and pyuria may resolve, during empiric treatment with an antibiotic that turns out to be discordant, according a retrospective study in Pediatrics.
“The low rate of care escalation and high rate of clinical improvement while on discordant antibiotics suggests that, for most patients, it would be reasonable to continue current empiric antibiotic practices until urine culture sensitivities return,” said first author Marie E. Wang, MD, a pediatric hospitalist at Stanford (Calif.) University, and colleagues.
The researchers examined the initial clinical response and escalation of care for 316 children with UTIs who received therapy to which the infecting isolate was not susceptible. The study included patients who had infections that were resistant to third-generation cephalosporins – that is, urinalysis found that the infections were not susceptible to ceftriaxone or cefotaxime in vitro. Before the resistant organisms were identified, however, the patients were started on discordant antibiotics.
Escalation of care was uncommon
The patients had a median age of 2.4 years, and 78% were girls. Approximately 90% were started on a cephalosporin, and about 65% received a first-generation cephalosporin. Patients presented during 2012-2017 to one of five children’s hospitals or to a large managed care organization with 10 hospitals in the United States. The investigators defined care escalation as a visit to the emergency department, hospitalization, or transfer to the ICU.
In all, seven patients (2%) had escalation of care on discordant antibiotics. Four children visited an emergency department without hospitalization, and three children were hospitalized because of persistent symptoms.
Among 230 cases for which the researchers had data about clinical response at a median follow-up of 3 days, 84% “had overall clinical improvement while on discordant antibiotics,” the authors said.
For 22 children who had repeat urine testing while on discordant antibiotics, 53% had resolution of pyuria, and 32% had improvement of pyuria, whereas 16% did not have improvement. Of the three patients without improvement, one had no change, and two had worsening.
Of 17 patients who had a repeat urine culture on discordant therapy, 65% had a negative repeat culture, and 18% grew the same pathogen with a decreased colony count. Two patients had a colony count that remained unchanged, and one patient had an increased colony count.
Small studies outside the United States have reported similar results, the researchers noted. Spontaneous resolution of UTIs or antibiotics reaching a sufficient concentration in the urine and renal parenchyma to achieve a clinical response are possible explanations for the findings, they wrote.
“Few children required escalation of care and most experienced initial clinical improvement,” noted Dr. Wang and colleagues. “Furthermore, in the small group of children that underwent repeat urine testing while on discordant therapy, most had resolution or improvement in pyuria and sterilization of their urine cultures. Our findings suggest that Additionally, given that these patients initially received what would generally be considered inadequate treatment, our findings may provide some insight into the natural history of UTIs and/or trigger further investigation into the relationship between in vitro urine culture susceptibilities and in vivo clinical response to treatment.”
‘Caution is needed’
The study “highlights an intriguing observation about children with UTIs unexpectedly responding to discordant antibiotic therapy,” Tej K. Mattoo, MD, and Basim I. Asmar, MD, wrote in an accompanying commentary.(doi: 10.1542/peds.2019-3512). Dr. Mattoo and Dr. Asmar, a pediatric nephrologist and a specialist in pediatric infectious diseases, respectively, at Wayne State University and affiliated with Children’s Hospital of Michigan, both in Detroit.
In an inpatient setting, it may be easy for physicians to reassess patients “once urine culture results reveal resistance to the treating antibiotic,” they noted. In an ambulatory setting, however, “it is likely that some patients will receive a full course of an antibiotic that does not have in vitro activity against the urinary pathogen.”
Physicians have a responsibility to use antibiotics judiciously, they said. Widely accepted principles include avoiding repeated courses of antibiotics, diagnosing UTIs appropriately, and not treating asymptomatic bacteriuria.
The study had no external funding. The authors had no relevant financial disclosures.
SOURCE: Wang ME et al. Pediatrics. 2020 Jan 17. doi: 10.1542/peds.2019-1608.
This article was updated 2/4/2020.
Children with urinary tract infections (UTIs) may improve clinically, and pyuria may resolve, during empiric treatment with an antibiotic that turns out to be discordant, according a retrospective study in Pediatrics.
“The low rate of care escalation and high rate of clinical improvement while on discordant antibiotics suggests that, for most patients, it would be reasonable to continue current empiric antibiotic practices until urine culture sensitivities return,” said first author Marie E. Wang, MD, a pediatric hospitalist at Stanford (Calif.) University, and colleagues.
The researchers examined the initial clinical response and escalation of care for 316 children with UTIs who received therapy to which the infecting isolate was not susceptible. The study included patients who had infections that were resistant to third-generation cephalosporins – that is, urinalysis found that the infections were not susceptible to ceftriaxone or cefotaxime in vitro. Before the resistant organisms were identified, however, the patients were started on discordant antibiotics.
Escalation of care was uncommon
The patients had a median age of 2.4 years, and 78% were girls. Approximately 90% were started on a cephalosporin, and about 65% received a first-generation cephalosporin. Patients presented during 2012-2017 to one of five children’s hospitals or to a large managed care organization with 10 hospitals in the United States. The investigators defined care escalation as a visit to the emergency department, hospitalization, or transfer to the ICU.
In all, seven patients (2%) had escalation of care on discordant antibiotics. Four children visited an emergency department without hospitalization, and three children were hospitalized because of persistent symptoms.
Among 230 cases for which the researchers had data about clinical response at a median follow-up of 3 days, 84% “had overall clinical improvement while on discordant antibiotics,” the authors said.
For 22 children who had repeat urine testing while on discordant antibiotics, 53% had resolution of pyuria, and 32% had improvement of pyuria, whereas 16% did not have improvement. Of the three patients without improvement, one had no change, and two had worsening.
Of 17 patients who had a repeat urine culture on discordant therapy, 65% had a negative repeat culture, and 18% grew the same pathogen with a decreased colony count. Two patients had a colony count that remained unchanged, and one patient had an increased colony count.
Small studies outside the United States have reported similar results, the researchers noted. Spontaneous resolution of UTIs or antibiotics reaching a sufficient concentration in the urine and renal parenchyma to achieve a clinical response are possible explanations for the findings, they wrote.
“Few children required escalation of care and most experienced initial clinical improvement,” noted Dr. Wang and colleagues. “Furthermore, in the small group of children that underwent repeat urine testing while on discordant therapy, most had resolution or improvement in pyuria and sterilization of their urine cultures. Our findings suggest that Additionally, given that these patients initially received what would generally be considered inadequate treatment, our findings may provide some insight into the natural history of UTIs and/or trigger further investigation into the relationship between in vitro urine culture susceptibilities and in vivo clinical response to treatment.”
‘Caution is needed’
The study “highlights an intriguing observation about children with UTIs unexpectedly responding to discordant antibiotic therapy,” Tej K. Mattoo, MD, and Basim I. Asmar, MD, wrote in an accompanying commentary.(doi: 10.1542/peds.2019-3512). Dr. Mattoo and Dr. Asmar, a pediatric nephrologist and a specialist in pediatric infectious diseases, respectively, at Wayne State University and affiliated with Children’s Hospital of Michigan, both in Detroit.
In an inpatient setting, it may be easy for physicians to reassess patients “once urine culture results reveal resistance to the treating antibiotic,” they noted. In an ambulatory setting, however, “it is likely that some patients will receive a full course of an antibiotic that does not have in vitro activity against the urinary pathogen.”
Physicians have a responsibility to use antibiotics judiciously, they said. Widely accepted principles include avoiding repeated courses of antibiotics, diagnosing UTIs appropriately, and not treating asymptomatic bacteriuria.
The study had no external funding. The authors had no relevant financial disclosures.
SOURCE: Wang ME et al. Pediatrics. 2020 Jan 17. doi: 10.1542/peds.2019-1608.
This article was updated 2/4/2020.
FROM PEDIATRICS
FDA approves cefiderocol for multidrug-resistant, complicated urinary tract infections
The Food and Drug Administration announced that it has approved cefiderocol (Fetroja), an IV antibacterial drug to treat complicated urinary tract infections (cUTIs), including kidney infections, caused by multidrug-resistant gram-negative microorganisms in patients 18 years of age or older.
The safety and effectiveness of cefiderocol was demonstrated in a pivotal study of 448 patients with cUTIs. Published results indicated that 73% of patients had resolution of symptoms and eradication of the bacteria approximately 7 days after completing treatment, compared with 55% in patients who received an alternative antibiotic.
observed in comparison to patients treated with other antibiotics in a trial of critically ill patients having multidrug-resistant gram-negative bacterial infections (clinical trials. gov NCT02714595).
The cause of the increase in mortality has not been determined, according to the FDA. Some of the deaths in the study were attributable to worsening or complications of infection, or underlying comorbidities, in patients treated for hospital-acquired/ventilator-associated pneumonia (i.e., nosocomial pneumonia), bloodstream infections, or sepsis. Thus, safety and efficacy of cefiderocol has not been established for the treating these types of infections, according to the announcement.
Adverse reactions observed in patients treated with cefiderocol included diarrhea, constipation, nausea, vomiting, elevations in liver tests, rash, infusion-site reactions, and candidiasis. The FDA added that cefiderocol should not be used in persons known to have a severe hypersensitivity to beta-lactam antibacterial drugs.
“A key global challenge the FDA faces as a public health agency is addressing the threat of antimicrobial-resistant infections, like cUTIs. This approval represents another step forward in the FDA’s overall efforts to ensure safe and effective antimicrobial drugs are available to patients for treating infections,” John Farley, MD, acting director of the Office of Infectious Diseases in the FDA’s Center for Drug Evaluation and Research said in the FDA press statement.
Fetroja is a product of Shionogi.
The Food and Drug Administration announced that it has approved cefiderocol (Fetroja), an IV antibacterial drug to treat complicated urinary tract infections (cUTIs), including kidney infections, caused by multidrug-resistant gram-negative microorganisms in patients 18 years of age or older.
The safety and effectiveness of cefiderocol was demonstrated in a pivotal study of 448 patients with cUTIs. Published results indicated that 73% of patients had resolution of symptoms and eradication of the bacteria approximately 7 days after completing treatment, compared with 55% in patients who received an alternative antibiotic.
observed in comparison to patients treated with other antibiotics in a trial of critically ill patients having multidrug-resistant gram-negative bacterial infections (clinical trials. gov NCT02714595).
The cause of the increase in mortality has not been determined, according to the FDA. Some of the deaths in the study were attributable to worsening or complications of infection, or underlying comorbidities, in patients treated for hospital-acquired/ventilator-associated pneumonia (i.e., nosocomial pneumonia), bloodstream infections, or sepsis. Thus, safety and efficacy of cefiderocol has not been established for the treating these types of infections, according to the announcement.
Adverse reactions observed in patients treated with cefiderocol included diarrhea, constipation, nausea, vomiting, elevations in liver tests, rash, infusion-site reactions, and candidiasis. The FDA added that cefiderocol should not be used in persons known to have a severe hypersensitivity to beta-lactam antibacterial drugs.
“A key global challenge the FDA faces as a public health agency is addressing the threat of antimicrobial-resistant infections, like cUTIs. This approval represents another step forward in the FDA’s overall efforts to ensure safe and effective antimicrobial drugs are available to patients for treating infections,” John Farley, MD, acting director of the Office of Infectious Diseases in the FDA’s Center for Drug Evaluation and Research said in the FDA press statement.
Fetroja is a product of Shionogi.
The Food and Drug Administration announced that it has approved cefiderocol (Fetroja), an IV antibacterial drug to treat complicated urinary tract infections (cUTIs), including kidney infections, caused by multidrug-resistant gram-negative microorganisms in patients 18 years of age or older.
The safety and effectiveness of cefiderocol was demonstrated in a pivotal study of 448 patients with cUTIs. Published results indicated that 73% of patients had resolution of symptoms and eradication of the bacteria approximately 7 days after completing treatment, compared with 55% in patients who received an alternative antibiotic.
observed in comparison to patients treated with other antibiotics in a trial of critically ill patients having multidrug-resistant gram-negative bacterial infections (clinical trials. gov NCT02714595).
The cause of the increase in mortality has not been determined, according to the FDA. Some of the deaths in the study were attributable to worsening or complications of infection, or underlying comorbidities, in patients treated for hospital-acquired/ventilator-associated pneumonia (i.e., nosocomial pneumonia), bloodstream infections, or sepsis. Thus, safety and efficacy of cefiderocol has not been established for the treating these types of infections, according to the announcement.
Adverse reactions observed in patients treated with cefiderocol included diarrhea, constipation, nausea, vomiting, elevations in liver tests, rash, infusion-site reactions, and candidiasis. The FDA added that cefiderocol should not be used in persons known to have a severe hypersensitivity to beta-lactam antibacterial drugs.
“A key global challenge the FDA faces as a public health agency is addressing the threat of antimicrobial-resistant infections, like cUTIs. This approval represents another step forward in the FDA’s overall efforts to ensure safe and effective antimicrobial drugs are available to patients for treating infections,” John Farley, MD, acting director of the Office of Infectious Diseases in the FDA’s Center for Drug Evaluation and Research said in the FDA press statement.
Fetroja is a product of Shionogi.
FROM THE FDA
CDC releases update of 2013 Antibiotic Resistance Threats Report
“You and I are living in a time when some miracle drugs no longer perform miracles and families are being ripped apart by a microscopic enemy. The time for action is now and we can be part of the solution,” said Robert R. Redfield, MD, director of the Centers for Disease Control and Prevention in his foreword to the new CDC report on antibiotic resistance.
In this update of the previous 2013 report, The current report uses EHRs and other data sources obtained by the CDC for relevant infections extrapolated to develop national disease incidence. The report focuses on “the top 18 pathogens that require attention now,” advises specific steps be taken to address these pathogens, and puts into perspective the future of antibiotic development, their use and abuse, and the continuing threat of antibiotic resistance.
The CDC categorizes these 18 pathogens as either an urgent, serious, or concerning threat.
Urgent Threats
- Carbapenem-resistant Acinetobacter, which cause pneumonia and wound, bloodstream, and urinary tract infections; they tend to affect patients in ICUs. Of particular concern, some Acinetobacter are resistant to nearly all antibiotics, with few new drugs in development (8,500 hospital infections in 2017; 700 deaths).
- Candida auris, a drug-resistant fungus that was first identified in 2009 in Asia and has quickly become a cause of severe infections around the world; it is extremely difficult to eradicate from health care settings. It began spreading in the United States in 2015, with 323 cases reported in 2018 (90% resistant to at least one antifungal, and 30% resistant to at least two antifungals).
- Clostridioides difficile, which can cause life-threatening diarrhea, most often in people who have taken antibiotics for other conditions. It is the most common health care–associated infection, and although decreasing in the health care system, it has not decreased in community settings (223,900 hospital infections in 2017, and 12,800 estimated deaths).
- Carbapenem-resistant Enterobacteriaceae, which most frequently infect patients who require devices such as catheters and those taking long courses of some antibiotics. Of particular concern is the fact that these bacteria contain a transmissible plasmid that can transfer their drug resistance to other pathogens (13,100 hospital infections in 2017, and 1,100 estimated deaths).
- Drug-resistant Neisseria gonorrhoeae, which is a sexually transmitted disease that can result in life-threatening ectopic pregnancy, lead to infertility, and can increase the risk of getting and giving HIV; it can also cause cardiovascular and neurological problems. It is resistant to all but one class of antibiotics, and half of all infections are resistant to at least one antibiotic (550,000 drug-resistant infections yearly).
Serious Threats
- Drug-resistant Campylobacter.
- Drug-resistant Candida.
- Extended spectrum beta-lactamase–producing Enterobacteriaceae.
- Vancomycin-resistant Enterococci.
- Multidrug-resistant Pseudomonas aeruginosa.
- Drug-resistant nontyphoidal Salmonella.
- Drug-resistant Salmonella serotype Typhi.
- Drug-resistant Shigella.
- Methicillin-resistant Staphylococcus aureus (MRSA).
- Drug-resistant Streptococcus pneumoniae.
- Drug-resistant Tuberculosis.
Concerning Threats
These comprise erythromycin-resistant group A Streptococcus and clindamycin-resistant group B Streptococcus.
In addition, the CDC has established a Watch List of three pathogens to be wary of: azole-resistant Aspergillus fumigatus, drug-resistant Mycoplasma genitalium, and drug-resistant Bordetella pertussis.
Because antibiotic resistance is a global phenomenon caused by and affecting everyone, the CDC provided solutions to the problem of antibiotic resistance at every level of society. This “comprehensive and coordinated response implements the U.S. National Action Plan for Combating Antibiotic-Resistant Bacteria” and includes cooperation with the Department of Health and Human Services, Department of Veterans Affairs, Department of Defense, Department of State, and Department of Agriculture, according to the report.
The key components of this response include using data and new technologies to detect and track antibiotic resistance; infection prevention and containment, especially in terms of outbreak response; improving antibiotic use across populations (one successful example being a 16% decrease of outpatient antibiotic prescribing to children during 2011-2017); improvements in the identification and intervention in the environment including water and soil and in sanitation; and a significant investment in vaccines, diagnostics, and novel therapeutics (the CDC provided nearly $110 million to 96 institutions for work in these areas).
The report also details some hope in the development of new antibiotics. As of June 2019, there were 42 new antibiotics in development, including 4 with new drug applications submitted, 17 with the potential to treat serious gram negative bacteria, and 11 that could address the urgent threats of gonorrhea or C. difficile. Overall, a quarter of these new antibiotics represent a novel drug class or use a novel mechanism of action.
Furthermore, 84% of U.S. hospitals report a stewardship program meeting all seven of CDC’s Core Elements of Hospital Antibiotic Stewardship. Proper stewardship is at the core of preventing the development of new antibiotic resistant pathogen strains.
In addition, the CDC noted a 5% overall decline in antibiotic prescribing in outpatient settings during 2011-2016.
“The problem will get worse if we do not act now, but we can make a difference,” according to Dr. Redfield. “Simply, here’s what works. Preventing infections protects everyone. Improving antibiotic use in people and animals slows the threat and helps preserve today’s drugs and those yet to come. Detecting threats and implementing interventions to keep germs from becoming widespread saves lives.”
In response to the release of the report, the AMA issued a supporting statement and cited its collection of educational resources for physicians focused on antibiotic use, resistance, and stewardship.
Similarly, the Society for Healthcare Epidemiology of America (SHEA) stated that hospitals were “a bright spot” in the CDC report and offered tools and resources available to educate and inform health care professionals about best practices in infection prevention and control, as well as antibiotic stewardship.
SOURCE: CDC. Antibiotic Resistance Threats in the United States 2019.
“You and I are living in a time when some miracle drugs no longer perform miracles and families are being ripped apart by a microscopic enemy. The time for action is now and we can be part of the solution,” said Robert R. Redfield, MD, director of the Centers for Disease Control and Prevention in his foreword to the new CDC report on antibiotic resistance.
In this update of the previous 2013 report, The current report uses EHRs and other data sources obtained by the CDC for relevant infections extrapolated to develop national disease incidence. The report focuses on “the top 18 pathogens that require attention now,” advises specific steps be taken to address these pathogens, and puts into perspective the future of antibiotic development, their use and abuse, and the continuing threat of antibiotic resistance.
The CDC categorizes these 18 pathogens as either an urgent, serious, or concerning threat.
Urgent Threats
- Carbapenem-resistant Acinetobacter, which cause pneumonia and wound, bloodstream, and urinary tract infections; they tend to affect patients in ICUs. Of particular concern, some Acinetobacter are resistant to nearly all antibiotics, with few new drugs in development (8,500 hospital infections in 2017; 700 deaths).
- Candida auris, a drug-resistant fungus that was first identified in 2009 in Asia and has quickly become a cause of severe infections around the world; it is extremely difficult to eradicate from health care settings. It began spreading in the United States in 2015, with 323 cases reported in 2018 (90% resistant to at least one antifungal, and 30% resistant to at least two antifungals).
- Clostridioides difficile, which can cause life-threatening diarrhea, most often in people who have taken antibiotics for other conditions. It is the most common health care–associated infection, and although decreasing in the health care system, it has not decreased in community settings (223,900 hospital infections in 2017, and 12,800 estimated deaths).
- Carbapenem-resistant Enterobacteriaceae, which most frequently infect patients who require devices such as catheters and those taking long courses of some antibiotics. Of particular concern is the fact that these bacteria contain a transmissible plasmid that can transfer their drug resistance to other pathogens (13,100 hospital infections in 2017, and 1,100 estimated deaths).
- Drug-resistant Neisseria gonorrhoeae, which is a sexually transmitted disease that can result in life-threatening ectopic pregnancy, lead to infertility, and can increase the risk of getting and giving HIV; it can also cause cardiovascular and neurological problems. It is resistant to all but one class of antibiotics, and half of all infections are resistant to at least one antibiotic (550,000 drug-resistant infections yearly).
Serious Threats
- Drug-resistant Campylobacter.
- Drug-resistant Candida.
- Extended spectrum beta-lactamase–producing Enterobacteriaceae.
- Vancomycin-resistant Enterococci.
- Multidrug-resistant Pseudomonas aeruginosa.
- Drug-resistant nontyphoidal Salmonella.
- Drug-resistant Salmonella serotype Typhi.
- Drug-resistant Shigella.
- Methicillin-resistant Staphylococcus aureus (MRSA).
- Drug-resistant Streptococcus pneumoniae.
- Drug-resistant Tuberculosis.
Concerning Threats
These comprise erythromycin-resistant group A Streptococcus and clindamycin-resistant group B Streptococcus.
In addition, the CDC has established a Watch List of three pathogens to be wary of: azole-resistant Aspergillus fumigatus, drug-resistant Mycoplasma genitalium, and drug-resistant Bordetella pertussis.
Because antibiotic resistance is a global phenomenon caused by and affecting everyone, the CDC provided solutions to the problem of antibiotic resistance at every level of society. This “comprehensive and coordinated response implements the U.S. National Action Plan for Combating Antibiotic-Resistant Bacteria” and includes cooperation with the Department of Health and Human Services, Department of Veterans Affairs, Department of Defense, Department of State, and Department of Agriculture, according to the report.
The key components of this response include using data and new technologies to detect and track antibiotic resistance; infection prevention and containment, especially in terms of outbreak response; improving antibiotic use across populations (one successful example being a 16% decrease of outpatient antibiotic prescribing to children during 2011-2017); improvements in the identification and intervention in the environment including water and soil and in sanitation; and a significant investment in vaccines, diagnostics, and novel therapeutics (the CDC provided nearly $110 million to 96 institutions for work in these areas).
The report also details some hope in the development of new antibiotics. As of June 2019, there were 42 new antibiotics in development, including 4 with new drug applications submitted, 17 with the potential to treat serious gram negative bacteria, and 11 that could address the urgent threats of gonorrhea or C. difficile. Overall, a quarter of these new antibiotics represent a novel drug class or use a novel mechanism of action.
Furthermore, 84% of U.S. hospitals report a stewardship program meeting all seven of CDC’s Core Elements of Hospital Antibiotic Stewardship. Proper stewardship is at the core of preventing the development of new antibiotic resistant pathogen strains.
In addition, the CDC noted a 5% overall decline in antibiotic prescribing in outpatient settings during 2011-2016.
“The problem will get worse if we do not act now, but we can make a difference,” according to Dr. Redfield. “Simply, here’s what works. Preventing infections protects everyone. Improving antibiotic use in people and animals slows the threat and helps preserve today’s drugs and those yet to come. Detecting threats and implementing interventions to keep germs from becoming widespread saves lives.”
In response to the release of the report, the AMA issued a supporting statement and cited its collection of educational resources for physicians focused on antibiotic use, resistance, and stewardship.
Similarly, the Society for Healthcare Epidemiology of America (SHEA) stated that hospitals were “a bright spot” in the CDC report and offered tools and resources available to educate and inform health care professionals about best practices in infection prevention and control, as well as antibiotic stewardship.
SOURCE: CDC. Antibiotic Resistance Threats in the United States 2019.
“You and I are living in a time when some miracle drugs no longer perform miracles and families are being ripped apart by a microscopic enemy. The time for action is now and we can be part of the solution,” said Robert R. Redfield, MD, director of the Centers for Disease Control and Prevention in his foreword to the new CDC report on antibiotic resistance.
In this update of the previous 2013 report, The current report uses EHRs and other data sources obtained by the CDC for relevant infections extrapolated to develop national disease incidence. The report focuses on “the top 18 pathogens that require attention now,” advises specific steps be taken to address these pathogens, and puts into perspective the future of antibiotic development, their use and abuse, and the continuing threat of antibiotic resistance.
The CDC categorizes these 18 pathogens as either an urgent, serious, or concerning threat.
Urgent Threats
- Carbapenem-resistant Acinetobacter, which cause pneumonia and wound, bloodstream, and urinary tract infections; they tend to affect patients in ICUs. Of particular concern, some Acinetobacter are resistant to nearly all antibiotics, with few new drugs in development (8,500 hospital infections in 2017; 700 deaths).
- Candida auris, a drug-resistant fungus that was first identified in 2009 in Asia and has quickly become a cause of severe infections around the world; it is extremely difficult to eradicate from health care settings. It began spreading in the United States in 2015, with 323 cases reported in 2018 (90% resistant to at least one antifungal, and 30% resistant to at least two antifungals).
- Clostridioides difficile, which can cause life-threatening diarrhea, most often in people who have taken antibiotics for other conditions. It is the most common health care–associated infection, and although decreasing in the health care system, it has not decreased in community settings (223,900 hospital infections in 2017, and 12,800 estimated deaths).
- Carbapenem-resistant Enterobacteriaceae, which most frequently infect patients who require devices such as catheters and those taking long courses of some antibiotics. Of particular concern is the fact that these bacteria contain a transmissible plasmid that can transfer their drug resistance to other pathogens (13,100 hospital infections in 2017, and 1,100 estimated deaths).
- Drug-resistant Neisseria gonorrhoeae, which is a sexually transmitted disease that can result in life-threatening ectopic pregnancy, lead to infertility, and can increase the risk of getting and giving HIV; it can also cause cardiovascular and neurological problems. It is resistant to all but one class of antibiotics, and half of all infections are resistant to at least one antibiotic (550,000 drug-resistant infections yearly).
Serious Threats
- Drug-resistant Campylobacter.
- Drug-resistant Candida.
- Extended spectrum beta-lactamase–producing Enterobacteriaceae.
- Vancomycin-resistant Enterococci.
- Multidrug-resistant Pseudomonas aeruginosa.
- Drug-resistant nontyphoidal Salmonella.
- Drug-resistant Salmonella serotype Typhi.
- Drug-resistant Shigella.
- Methicillin-resistant Staphylococcus aureus (MRSA).
- Drug-resistant Streptococcus pneumoniae.
- Drug-resistant Tuberculosis.
Concerning Threats
These comprise erythromycin-resistant group A Streptococcus and clindamycin-resistant group B Streptococcus.
In addition, the CDC has established a Watch List of three pathogens to be wary of: azole-resistant Aspergillus fumigatus, drug-resistant Mycoplasma genitalium, and drug-resistant Bordetella pertussis.
Because antibiotic resistance is a global phenomenon caused by and affecting everyone, the CDC provided solutions to the problem of antibiotic resistance at every level of society. This “comprehensive and coordinated response implements the U.S. National Action Plan for Combating Antibiotic-Resistant Bacteria” and includes cooperation with the Department of Health and Human Services, Department of Veterans Affairs, Department of Defense, Department of State, and Department of Agriculture, according to the report.
The key components of this response include using data and new technologies to detect and track antibiotic resistance; infection prevention and containment, especially in terms of outbreak response; improving antibiotic use across populations (one successful example being a 16% decrease of outpatient antibiotic prescribing to children during 2011-2017); improvements in the identification and intervention in the environment including water and soil and in sanitation; and a significant investment in vaccines, diagnostics, and novel therapeutics (the CDC provided nearly $110 million to 96 institutions for work in these areas).
The report also details some hope in the development of new antibiotics. As of June 2019, there were 42 new antibiotics in development, including 4 with new drug applications submitted, 17 with the potential to treat serious gram negative bacteria, and 11 that could address the urgent threats of gonorrhea or C. difficile. Overall, a quarter of these new antibiotics represent a novel drug class or use a novel mechanism of action.
Furthermore, 84% of U.S. hospitals report a stewardship program meeting all seven of CDC’s Core Elements of Hospital Antibiotic Stewardship. Proper stewardship is at the core of preventing the development of new antibiotic resistant pathogen strains.
In addition, the CDC noted a 5% overall decline in antibiotic prescribing in outpatient settings during 2011-2016.
“The problem will get worse if we do not act now, but we can make a difference,” according to Dr. Redfield. “Simply, here’s what works. Preventing infections protects everyone. Improving antibiotic use in people and animals slows the threat and helps preserve today’s drugs and those yet to come. Detecting threats and implementing interventions to keep germs from becoming widespread saves lives.”
In response to the release of the report, the AMA issued a supporting statement and cited its collection of educational resources for physicians focused on antibiotic use, resistance, and stewardship.
Similarly, the Society for Healthcare Epidemiology of America (SHEA) stated that hospitals were “a bright spot” in the CDC report and offered tools and resources available to educate and inform health care professionals about best practices in infection prevention and control, as well as antibiotic stewardship.
SOURCE: CDC. Antibiotic Resistance Threats in the United States 2019.
Rifabutin-based triple therapy for H. pylori gets high marks
SAN ANTONIO – David Y. Graham, MD, asserted at the annual meeting of the American College of Gastroenterology.
The drug, recently approved as Talicia, is a rifabutin-based triple therapy. Each capsule contains 50 mg of rifabutin, 1,000 mg of amoxicillin, and 40 mg of omeprazole. As in the pivotal phase 3 trial led by Dr. Graham, the approved treatment regimen calls for adults to take four capsules every 8 hours for 14 days.
The impetus for developing the new therapy centers on the growing problem of resistance to long-standard agents for H. pylori eradication, including metronidazole and clarithromycin. The World Health Organization has declared H. pylori eradication to be a high priority for therapeutic development. Rifabutin resistance is rare: In one study, 413 of 414 strains of H. pylori were sensitive to the antibiotic, noted Dr. Graham, professor of medicine at Baylor College of Medicine, Houston.
He presented the results of the pivotal phase 3, double-blind, multicenter, active comparator trial, known as ERADICATE Hp2, in which 455 participants with confirmed H. pylori infection were randomized to a course of the all-in-one-capsule triple drug combo or to dual therapy with four capsules, each containing 1,000 mg of amoxicillin and 40 mg of omeprazole, every 8 hours for 14 days.
The primary endpoint was H. pylori eradication as documented by a negative urea breath test obtained 4-6 weeks after completing 14 days of treatment. The rate was 84% with the rifabutin-based combo, compared with 58% seen with the high-dose dual therapy. Moreover, in a prespecified secondary analysis restricted to the 391 participants who were confirmed to be actually taking their medication as evidenced by a positive blood level measured on day 13, the eradication rates rose to 90% and 65%, respectively.
The antimicrobial resistance rates documented in this study were eye opening: 17% of patients’ strains were resistant to clarithromycin, 44% to metronidazole, and 10.5% to both. Of concern, 6.4% of participants’ strains were amoxicillin resistant.
“For the first time we saw a low level – but a definite level – of amoxicillin resistance. That’s something we had not seen previously,” Dr. Graham said.
No rifabutin resistance was detected before or after treatment.
The side effect profiles of the two treatment regimens were similar. Diarrhea was reported by 9% of participants, headache by 7%, and nausea by 5%. No serious adverse events occurred in the 14-day study.
The efficacy of the rifabutin-based therapy wasn’t affected by metronidazole or clarithromycin resistance.
The ERADICATE Hp2 trial was sponsored by RedHill Biopharma of Tel Aviv. Dr. Graham reported having no financial conflicts.
SAN ANTONIO – David Y. Graham, MD, asserted at the annual meeting of the American College of Gastroenterology.
The drug, recently approved as Talicia, is a rifabutin-based triple therapy. Each capsule contains 50 mg of rifabutin, 1,000 mg of amoxicillin, and 40 mg of omeprazole. As in the pivotal phase 3 trial led by Dr. Graham, the approved treatment regimen calls for adults to take four capsules every 8 hours for 14 days.
The impetus for developing the new therapy centers on the growing problem of resistance to long-standard agents for H. pylori eradication, including metronidazole and clarithromycin. The World Health Organization has declared H. pylori eradication to be a high priority for therapeutic development. Rifabutin resistance is rare: In one study, 413 of 414 strains of H. pylori were sensitive to the antibiotic, noted Dr. Graham, professor of medicine at Baylor College of Medicine, Houston.
He presented the results of the pivotal phase 3, double-blind, multicenter, active comparator trial, known as ERADICATE Hp2, in which 455 participants with confirmed H. pylori infection were randomized to a course of the all-in-one-capsule triple drug combo or to dual therapy with four capsules, each containing 1,000 mg of amoxicillin and 40 mg of omeprazole, every 8 hours for 14 days.
The primary endpoint was H. pylori eradication as documented by a negative urea breath test obtained 4-6 weeks after completing 14 days of treatment. The rate was 84% with the rifabutin-based combo, compared with 58% seen with the high-dose dual therapy. Moreover, in a prespecified secondary analysis restricted to the 391 participants who were confirmed to be actually taking their medication as evidenced by a positive blood level measured on day 13, the eradication rates rose to 90% and 65%, respectively.
The antimicrobial resistance rates documented in this study were eye opening: 17% of patients’ strains were resistant to clarithromycin, 44% to metronidazole, and 10.5% to both. Of concern, 6.4% of participants’ strains were amoxicillin resistant.
“For the first time we saw a low level – but a definite level – of amoxicillin resistance. That’s something we had not seen previously,” Dr. Graham said.
No rifabutin resistance was detected before or after treatment.
The side effect profiles of the two treatment regimens were similar. Diarrhea was reported by 9% of participants, headache by 7%, and nausea by 5%. No serious adverse events occurred in the 14-day study.
The efficacy of the rifabutin-based therapy wasn’t affected by metronidazole or clarithromycin resistance.
The ERADICATE Hp2 trial was sponsored by RedHill Biopharma of Tel Aviv. Dr. Graham reported having no financial conflicts.
SAN ANTONIO – David Y. Graham, MD, asserted at the annual meeting of the American College of Gastroenterology.
The drug, recently approved as Talicia, is a rifabutin-based triple therapy. Each capsule contains 50 mg of rifabutin, 1,000 mg of amoxicillin, and 40 mg of omeprazole. As in the pivotal phase 3 trial led by Dr. Graham, the approved treatment regimen calls for adults to take four capsules every 8 hours for 14 days.
The impetus for developing the new therapy centers on the growing problem of resistance to long-standard agents for H. pylori eradication, including metronidazole and clarithromycin. The World Health Organization has declared H. pylori eradication to be a high priority for therapeutic development. Rifabutin resistance is rare: In one study, 413 of 414 strains of H. pylori were sensitive to the antibiotic, noted Dr. Graham, professor of medicine at Baylor College of Medicine, Houston.
He presented the results of the pivotal phase 3, double-blind, multicenter, active comparator trial, known as ERADICATE Hp2, in which 455 participants with confirmed H. pylori infection were randomized to a course of the all-in-one-capsule triple drug combo or to dual therapy with four capsules, each containing 1,000 mg of amoxicillin and 40 mg of omeprazole, every 8 hours for 14 days.
The primary endpoint was H. pylori eradication as documented by a negative urea breath test obtained 4-6 weeks after completing 14 days of treatment. The rate was 84% with the rifabutin-based combo, compared with 58% seen with the high-dose dual therapy. Moreover, in a prespecified secondary analysis restricted to the 391 participants who were confirmed to be actually taking their medication as evidenced by a positive blood level measured on day 13, the eradication rates rose to 90% and 65%, respectively.
The antimicrobial resistance rates documented in this study were eye opening: 17% of patients’ strains were resistant to clarithromycin, 44% to metronidazole, and 10.5% to both. Of concern, 6.4% of participants’ strains were amoxicillin resistant.
“For the first time we saw a low level – but a definite level – of amoxicillin resistance. That’s something we had not seen previously,” Dr. Graham said.
No rifabutin resistance was detected before or after treatment.
The side effect profiles of the two treatment regimens were similar. Diarrhea was reported by 9% of participants, headache by 7%, and nausea by 5%. No serious adverse events occurred in the 14-day study.
The efficacy of the rifabutin-based therapy wasn’t affected by metronidazole or clarithromycin resistance.
The ERADICATE Hp2 trial was sponsored by RedHill Biopharma of Tel Aviv. Dr. Graham reported having no financial conflicts.
REPORTING FROM ACG 2019
IDWeek examined hot topics in the clinical treatment of infectious diseases
WASHINGTON – The top existential threats to health today are climate change and overpopulation, but third in this list is antimicrobial resistance, according to Helen Boucher, MD, of Tufts Medical Center, Boston. In her talk at an annual scientific meeting on infectious diseases, however, she focused on the last, presenting the hottest developments in the clinical science of treating and identifying disease-causing agents.
In particular, she discussed two of the most important developments in the area of rapid diagnostics: cell-free microbial DNA in plasma and the use of next-generation gene sequencing for determining disease etiology.
Using a meta-genomics test, cell-free microbial DNA can be identified in plasma from more than 1,000 relevant bacteria, DNA viruses, fungi, and parasites. Though importantly, RNA viruses are not detectable using this technology, she added. Although current sampling is of plasma, this might expand to the ability to use urine in the future. She discussed its particular use in sepsis, as outlined in a paper in Nature Microbiology (2019;4[4]:663-74). The researchers examined 350 suspected sepsis patients and they found a 93% sensitivity, compared with reference standards, using this new test. The main issue with the test was a high incidence of false positives.
Another test Dr. Boucher discussed was the use of meta-genomic next-generation sequencing. She referred to a 2019 paper in the New England Journal of Medicine, which discussed the use of clinical meta-genomic next-generation sequencing of cerebrospinal fluid for the diagnosis of meningitis and encephalitis (2019;380[27]:2327-40). Next-generation sequencing identified 13% of patients positive who were missed using standard screening. However, a number of patients were not diagnosed using the new test, showing that this technique was an improvement over current methods, but not 100% successful.
Dr. Boucher stressed the need for “diagnostic stewardship” to identify the correct microbial agent causing disease, allowing for the use of appropriate treatment rather than shotgun approaches to prevent the development of antibiotic resistance. This practice requires collaboration between the clinical laboratory, pharmacists, and infectious disease specialists.
Dr. Boucher then switched to the area of therapeutics, focusing on the introduction of new antibiotics and other innovations in disease treatment methodologies, especially in the field of transplant ID.
“We have new drugs. That is the good news,” with the goals of the 10 x ’20 initiative to develop 10 new systemic antibiotics by 2020, having “been met and then some,” said Dr. Boucher.
“We now have 13 new drugs, systemically available antibiotics, available by August 2019,” she added, discussing several of the new drugs.
In addition, she pointed out several studies that have indicated that shorter courses of antibiotics are better than longer, and that, in many cases, oral therapy is better than intravenous.
In the burgeoning area of transplant ID studies, Dr. Boucher discussed new research showing that vaccinations in transplanted patients can be advised in several instances, though may require higher dosing, and how the use of hepatitis C virus–positive organs for transplant is showing good results and increasing the availability of organs for transplant.
Dr. Boucher has served on data review committees for Actelion and Medtronix and has served as a consultant/advisor for Cerexa, Durata Therapeutics, Merck (adjudication committee), Rib-X, and Wyeth/Pfizer (data safety monitoring committee).
WASHINGTON – The top existential threats to health today are climate change and overpopulation, but third in this list is antimicrobial resistance, according to Helen Boucher, MD, of Tufts Medical Center, Boston. In her talk at an annual scientific meeting on infectious diseases, however, she focused on the last, presenting the hottest developments in the clinical science of treating and identifying disease-causing agents.
In particular, she discussed two of the most important developments in the area of rapid diagnostics: cell-free microbial DNA in plasma and the use of next-generation gene sequencing for determining disease etiology.
Using a meta-genomics test, cell-free microbial DNA can be identified in plasma from more than 1,000 relevant bacteria, DNA viruses, fungi, and parasites. Though importantly, RNA viruses are not detectable using this technology, she added. Although current sampling is of plasma, this might expand to the ability to use urine in the future. She discussed its particular use in sepsis, as outlined in a paper in Nature Microbiology (2019;4[4]:663-74). The researchers examined 350 suspected sepsis patients and they found a 93% sensitivity, compared with reference standards, using this new test. The main issue with the test was a high incidence of false positives.
Another test Dr. Boucher discussed was the use of meta-genomic next-generation sequencing. She referred to a 2019 paper in the New England Journal of Medicine, which discussed the use of clinical meta-genomic next-generation sequencing of cerebrospinal fluid for the diagnosis of meningitis and encephalitis (2019;380[27]:2327-40). Next-generation sequencing identified 13% of patients positive who were missed using standard screening. However, a number of patients were not diagnosed using the new test, showing that this technique was an improvement over current methods, but not 100% successful.
Dr. Boucher stressed the need for “diagnostic stewardship” to identify the correct microbial agent causing disease, allowing for the use of appropriate treatment rather than shotgun approaches to prevent the development of antibiotic resistance. This practice requires collaboration between the clinical laboratory, pharmacists, and infectious disease specialists.
Dr. Boucher then switched to the area of therapeutics, focusing on the introduction of new antibiotics and other innovations in disease treatment methodologies, especially in the field of transplant ID.
“We have new drugs. That is the good news,” with the goals of the 10 x ’20 initiative to develop 10 new systemic antibiotics by 2020, having “been met and then some,” said Dr. Boucher.
“We now have 13 new drugs, systemically available antibiotics, available by August 2019,” she added, discussing several of the new drugs.
In addition, she pointed out several studies that have indicated that shorter courses of antibiotics are better than longer, and that, in many cases, oral therapy is better than intravenous.
In the burgeoning area of transplant ID studies, Dr. Boucher discussed new research showing that vaccinations in transplanted patients can be advised in several instances, though may require higher dosing, and how the use of hepatitis C virus–positive organs for transplant is showing good results and increasing the availability of organs for transplant.
Dr. Boucher has served on data review committees for Actelion and Medtronix and has served as a consultant/advisor for Cerexa, Durata Therapeutics, Merck (adjudication committee), Rib-X, and Wyeth/Pfizer (data safety monitoring committee).
WASHINGTON – The top existential threats to health today are climate change and overpopulation, but third in this list is antimicrobial resistance, according to Helen Boucher, MD, of Tufts Medical Center, Boston. In her talk at an annual scientific meeting on infectious diseases, however, she focused on the last, presenting the hottest developments in the clinical science of treating and identifying disease-causing agents.
In particular, she discussed two of the most important developments in the area of rapid diagnostics: cell-free microbial DNA in plasma and the use of next-generation gene sequencing for determining disease etiology.
Using a meta-genomics test, cell-free microbial DNA can be identified in plasma from more than 1,000 relevant bacteria, DNA viruses, fungi, and parasites. Though importantly, RNA viruses are not detectable using this technology, she added. Although current sampling is of plasma, this might expand to the ability to use urine in the future. She discussed its particular use in sepsis, as outlined in a paper in Nature Microbiology (2019;4[4]:663-74). The researchers examined 350 suspected sepsis patients and they found a 93% sensitivity, compared with reference standards, using this new test. The main issue with the test was a high incidence of false positives.
Another test Dr. Boucher discussed was the use of meta-genomic next-generation sequencing. She referred to a 2019 paper in the New England Journal of Medicine, which discussed the use of clinical meta-genomic next-generation sequencing of cerebrospinal fluid for the diagnosis of meningitis and encephalitis (2019;380[27]:2327-40). Next-generation sequencing identified 13% of patients positive who were missed using standard screening. However, a number of patients were not diagnosed using the new test, showing that this technique was an improvement over current methods, but not 100% successful.
Dr. Boucher stressed the need for “diagnostic stewardship” to identify the correct microbial agent causing disease, allowing for the use of appropriate treatment rather than shotgun approaches to prevent the development of antibiotic resistance. This practice requires collaboration between the clinical laboratory, pharmacists, and infectious disease specialists.
Dr. Boucher then switched to the area of therapeutics, focusing on the introduction of new antibiotics and other innovations in disease treatment methodologies, especially in the field of transplant ID.
“We have new drugs. That is the good news,” with the goals of the 10 x ’20 initiative to develop 10 new systemic antibiotics by 2020, having “been met and then some,” said Dr. Boucher.
“We now have 13 new drugs, systemically available antibiotics, available by August 2019,” she added, discussing several of the new drugs.
In addition, she pointed out several studies that have indicated that shorter courses of antibiotics are better than longer, and that, in many cases, oral therapy is better than intravenous.
In the burgeoning area of transplant ID studies, Dr. Boucher discussed new research showing that vaccinations in transplanted patients can be advised in several instances, though may require higher dosing, and how the use of hepatitis C virus–positive organs for transplant is showing good results and increasing the availability of organs for transplant.
Dr. Boucher has served on data review committees for Actelion and Medtronix and has served as a consultant/advisor for Cerexa, Durata Therapeutics, Merck (adjudication committee), Rib-X, and Wyeth/Pfizer (data safety monitoring committee).
EXPERT ANALYSIS FROM IDWEEK 2019
Oral beta-lactams provide noninferior postdischarge pyelonephritis treatment
WASHINGTON – Patients hospitalized for pyelonephritis and discharged after receiving intravenous antibiotic treatment who then received step-down treatment with an oral beta-lactam had 30-day outcomes that were noninferior to patients who received an oral fluoroquinolone or trimethoprim-sulfamethoxazole as their discharge regimen, in a retrospective study of 211 patients managed at either of two U.S. hospitals.
This was the largest comparison reported on oral beta-lactam drugs for postdischarge treatment of pyelonephritis relative to the standard oral agents, fluoroquinolones and trimethoprim-sulfamethoxazole (Bactrim), Athena Hobbs, PharmD, said at an annual scientific meeting on infectious diseases. The superiority of an oral fluoroquinolone or trimethoprim-sulfamethoxazole and inferiority of oral beta-lactam drugs were cited in 2010 guidelines for managing pyelonephritis from the Infectious Diseases Society of America (Clin Infect Dis. 2011 March 1;52 [5]: e103-20).
Although limited as a nonrandomized, retrospective comparison, the finding of at least similar efficacy by beta-lactam agents “opens new treatment options” that avoid issues with drug resistance and adverse effects from treatment with fluoroquinolones or trimethoprim-sulfamethoxazole, Dr. Hobbs said in a video interview. Beta-lactams have already been embraced for this indication by some hospitalists, demonstrated by their use of beta-lactam antibiotics for 122 (58%) of the 211 patients included in the study. Among the 89 patients discharged on a non–beta-lactam, 69 (78%) had fluoroquinolone treatment and the remaining 20 patients went home taking trimethoprim-sulfamethoxazole. The new finding “confirms that we are not doing harm to patients,” with this existing practice of mostly prescribing an oral beta-lactam drug, noted Dr. Hobbs, an infectious diseases pharmacy specialist at Baptist Memorial Hospital in Memphis.
The study included patients aged 18-89 years hospitalized during 2014-2017 for a primary diagnosis of pyelonephritis at Baptist or at a second Hospital in Austin, Tex. The study excluded patients in intensive care, with a urologic abnormality, pregnant women, and patients treated with an intravenous antibiotic other than a beta-lactam for more than 24 hours. The most commonly used intravenous drugs were cefazolin and ceftriaxone. The enrolled patients averaged just over 40 years old, and more than 90% were women.
The study’s primary outcome was the 30-day rate of either hospital readmission or an ED visit for pyelonephritis or a urinary tract infection. This occurred in 4.9% of the patients discharged on an oral course of a beta-lactam drug, and in 5.6% of those discharged on either a fluoroquinolone or trimethoprim-sulfamethoxazole, a difference that was not statistically significant and that met the prespecified criteria for noninferiority, Dr. Hobbs reported. The most commonly prescribed oral beta-lactam was cefuroxime in about half the patients, followed by cephalexin or cefadroxil in about a quarter of patients, and amoxicillin with clavulanate in 19%. The two arms of the study also showed no significant difference in infection recurrences during 90-day follow-up.
The study received no commercial funding. Dr. Hobbs had no relevant disclosures.
WASHINGTON – Patients hospitalized for pyelonephritis and discharged after receiving intravenous antibiotic treatment who then received step-down treatment with an oral beta-lactam had 30-day outcomes that were noninferior to patients who received an oral fluoroquinolone or trimethoprim-sulfamethoxazole as their discharge regimen, in a retrospective study of 211 patients managed at either of two U.S. hospitals.
This was the largest comparison reported on oral beta-lactam drugs for postdischarge treatment of pyelonephritis relative to the standard oral agents, fluoroquinolones and trimethoprim-sulfamethoxazole (Bactrim), Athena Hobbs, PharmD, said at an annual scientific meeting on infectious diseases. The superiority of an oral fluoroquinolone or trimethoprim-sulfamethoxazole and inferiority of oral beta-lactam drugs were cited in 2010 guidelines for managing pyelonephritis from the Infectious Diseases Society of America (Clin Infect Dis. 2011 March 1;52 [5]: e103-20).
Although limited as a nonrandomized, retrospective comparison, the finding of at least similar efficacy by beta-lactam agents “opens new treatment options” that avoid issues with drug resistance and adverse effects from treatment with fluoroquinolones or trimethoprim-sulfamethoxazole, Dr. Hobbs said in a video interview. Beta-lactams have already been embraced for this indication by some hospitalists, demonstrated by their use of beta-lactam antibiotics for 122 (58%) of the 211 patients included in the study. Among the 89 patients discharged on a non–beta-lactam, 69 (78%) had fluoroquinolone treatment and the remaining 20 patients went home taking trimethoprim-sulfamethoxazole. The new finding “confirms that we are not doing harm to patients,” with this existing practice of mostly prescribing an oral beta-lactam drug, noted Dr. Hobbs, an infectious diseases pharmacy specialist at Baptist Memorial Hospital in Memphis.
The study included patients aged 18-89 years hospitalized during 2014-2017 for a primary diagnosis of pyelonephritis at Baptist or at a second Hospital in Austin, Tex. The study excluded patients in intensive care, with a urologic abnormality, pregnant women, and patients treated with an intravenous antibiotic other than a beta-lactam for more than 24 hours. The most commonly used intravenous drugs were cefazolin and ceftriaxone. The enrolled patients averaged just over 40 years old, and more than 90% were women.
The study’s primary outcome was the 30-day rate of either hospital readmission or an ED visit for pyelonephritis or a urinary tract infection. This occurred in 4.9% of the patients discharged on an oral course of a beta-lactam drug, and in 5.6% of those discharged on either a fluoroquinolone or trimethoprim-sulfamethoxazole, a difference that was not statistically significant and that met the prespecified criteria for noninferiority, Dr. Hobbs reported. The most commonly prescribed oral beta-lactam was cefuroxime in about half the patients, followed by cephalexin or cefadroxil in about a quarter of patients, and amoxicillin with clavulanate in 19%. The two arms of the study also showed no significant difference in infection recurrences during 90-day follow-up.
The study received no commercial funding. Dr. Hobbs had no relevant disclosures.
WASHINGTON – Patients hospitalized for pyelonephritis and discharged after receiving intravenous antibiotic treatment who then received step-down treatment with an oral beta-lactam had 30-day outcomes that were noninferior to patients who received an oral fluoroquinolone or trimethoprim-sulfamethoxazole as their discharge regimen, in a retrospective study of 211 patients managed at either of two U.S. hospitals.
This was the largest comparison reported on oral beta-lactam drugs for postdischarge treatment of pyelonephritis relative to the standard oral agents, fluoroquinolones and trimethoprim-sulfamethoxazole (Bactrim), Athena Hobbs, PharmD, said at an annual scientific meeting on infectious diseases. The superiority of an oral fluoroquinolone or trimethoprim-sulfamethoxazole and inferiority of oral beta-lactam drugs were cited in 2010 guidelines for managing pyelonephritis from the Infectious Diseases Society of America (Clin Infect Dis. 2011 March 1;52 [5]: e103-20).
Although limited as a nonrandomized, retrospective comparison, the finding of at least similar efficacy by beta-lactam agents “opens new treatment options” that avoid issues with drug resistance and adverse effects from treatment with fluoroquinolones or trimethoprim-sulfamethoxazole, Dr. Hobbs said in a video interview. Beta-lactams have already been embraced for this indication by some hospitalists, demonstrated by their use of beta-lactam antibiotics for 122 (58%) of the 211 patients included in the study. Among the 89 patients discharged on a non–beta-lactam, 69 (78%) had fluoroquinolone treatment and the remaining 20 patients went home taking trimethoprim-sulfamethoxazole. The new finding “confirms that we are not doing harm to patients,” with this existing practice of mostly prescribing an oral beta-lactam drug, noted Dr. Hobbs, an infectious diseases pharmacy specialist at Baptist Memorial Hospital in Memphis.
The study included patients aged 18-89 years hospitalized during 2014-2017 for a primary diagnosis of pyelonephritis at Baptist or at a second Hospital in Austin, Tex. The study excluded patients in intensive care, with a urologic abnormality, pregnant women, and patients treated with an intravenous antibiotic other than a beta-lactam for more than 24 hours. The most commonly used intravenous drugs were cefazolin and ceftriaxone. The enrolled patients averaged just over 40 years old, and more than 90% were women.
The study’s primary outcome was the 30-day rate of either hospital readmission or an ED visit for pyelonephritis or a urinary tract infection. This occurred in 4.9% of the patients discharged on an oral course of a beta-lactam drug, and in 5.6% of those discharged on either a fluoroquinolone or trimethoprim-sulfamethoxazole, a difference that was not statistically significant and that met the prespecified criteria for noninferiority, Dr. Hobbs reported. The most commonly prescribed oral beta-lactam was cefuroxime in about half the patients, followed by cephalexin or cefadroxil in about a quarter of patients, and amoxicillin with clavulanate in 19%. The two arms of the study also showed no significant difference in infection recurrences during 90-day follow-up.
The study received no commercial funding. Dr. Hobbs had no relevant disclosures.
REPORTING FROM IDWEEK 2019
Hospital slashes S. aureus vancomycin resistance
LJUBLJANA, SLOVENIA – , Johannes Huebner, MD, reported at the annual meeting of the European Society for Paediatric Infectious Diseases.
He presented a retrospective analysis of S. aureus isolates obtained from 540 patients at the Dr. von Hauner Children’s Hospital, Munich, from 2002 to 2017. All were either newly identified methicillin-resistant S. aureus (MRSA) or specimens from bacteremic children with invasive MRSA or methicillin-sensitive S. aureus (MSSA). The strains were tested for vancomycin resistance and minimum inhibitory concentration (MIC). The results from the 200 isolates obtained from 2002 to 2009 were then compared to the 340 specimens from 2010 to 2017, when antibiotic stewardship programs rose to the fore at the pediatric hospital.
All samples proved to be vancomycin sensitive. The further good news was there was absolutely no evidence of the worrisome vancomycin MIC creep that has been described at some centers. On the contrary, the MIC was significantly lower in the later samples, at 0.99 mcg/mL, compared with 1.11 mcg/mL in the earlier period. Moreover, the prevalence of heterogeneous glycopeptide-intermediate S. aureus (hGISA) – a phenotype that has been associated with increased rates of treatment failure – improved from 25% in the earlier period to 6% during the later period, reported Dr. Huebner, head of the division of pediatric infectious diseases at the children’s hospital, part of the University of Munich.
Vancomycin MICs weren’t significantly different between the MRSA and MSSA samples.
Based upon this favorable institutional experience, vancomycin remains the first-line treatment for suspected severe gram-positive cocci infections as well as proven infections involving MRSA at Dr. von Hauner Children’s Hospital.
These vancomycin MIC and hGISA data underscore the importance of periodically monitoring local S. aureus antimicrobial susceptibilities, which, as in this case, can differ from the broader global trends. The vancomycin MIC creep issue hadn’t been studied previously in German hospitals, according to Dr. Huebner.
He and his coworkers have published details of the elements of pediatric antibiotic stewardship programs they have found to be most effective (Infection. 2017 Aug;45[4]:493-504) as well as a systematic review of studies on the favorable economic impact of such programs (J Hosp Infect. 2019 Aug;102[4]:369-376).
Dr. Huebner reported having no financial conflicts regarding his study, which was conducted free of commercial support.
LJUBLJANA, SLOVENIA – , Johannes Huebner, MD, reported at the annual meeting of the European Society for Paediatric Infectious Diseases.
He presented a retrospective analysis of S. aureus isolates obtained from 540 patients at the Dr. von Hauner Children’s Hospital, Munich, from 2002 to 2017. All were either newly identified methicillin-resistant S. aureus (MRSA) or specimens from bacteremic children with invasive MRSA or methicillin-sensitive S. aureus (MSSA). The strains were tested for vancomycin resistance and minimum inhibitory concentration (MIC). The results from the 200 isolates obtained from 2002 to 2009 were then compared to the 340 specimens from 2010 to 2017, when antibiotic stewardship programs rose to the fore at the pediatric hospital.
All samples proved to be vancomycin sensitive. The further good news was there was absolutely no evidence of the worrisome vancomycin MIC creep that has been described at some centers. On the contrary, the MIC was significantly lower in the later samples, at 0.99 mcg/mL, compared with 1.11 mcg/mL in the earlier period. Moreover, the prevalence of heterogeneous glycopeptide-intermediate S. aureus (hGISA) – a phenotype that has been associated with increased rates of treatment failure – improved from 25% in the earlier period to 6% during the later period, reported Dr. Huebner, head of the division of pediatric infectious diseases at the children’s hospital, part of the University of Munich.
Vancomycin MICs weren’t significantly different between the MRSA and MSSA samples.
Based upon this favorable institutional experience, vancomycin remains the first-line treatment for suspected severe gram-positive cocci infections as well as proven infections involving MRSA at Dr. von Hauner Children’s Hospital.
These vancomycin MIC and hGISA data underscore the importance of periodically monitoring local S. aureus antimicrobial susceptibilities, which, as in this case, can differ from the broader global trends. The vancomycin MIC creep issue hadn’t been studied previously in German hospitals, according to Dr. Huebner.
He and his coworkers have published details of the elements of pediatric antibiotic stewardship programs they have found to be most effective (Infection. 2017 Aug;45[4]:493-504) as well as a systematic review of studies on the favorable economic impact of such programs (J Hosp Infect. 2019 Aug;102[4]:369-376).
Dr. Huebner reported having no financial conflicts regarding his study, which was conducted free of commercial support.
LJUBLJANA, SLOVENIA – , Johannes Huebner, MD, reported at the annual meeting of the European Society for Paediatric Infectious Diseases.
He presented a retrospective analysis of S. aureus isolates obtained from 540 patients at the Dr. von Hauner Children’s Hospital, Munich, from 2002 to 2017. All were either newly identified methicillin-resistant S. aureus (MRSA) or specimens from bacteremic children with invasive MRSA or methicillin-sensitive S. aureus (MSSA). The strains were tested for vancomycin resistance and minimum inhibitory concentration (MIC). The results from the 200 isolates obtained from 2002 to 2009 were then compared to the 340 specimens from 2010 to 2017, when antibiotic stewardship programs rose to the fore at the pediatric hospital.
All samples proved to be vancomycin sensitive. The further good news was there was absolutely no evidence of the worrisome vancomycin MIC creep that has been described at some centers. On the contrary, the MIC was significantly lower in the later samples, at 0.99 mcg/mL, compared with 1.11 mcg/mL in the earlier period. Moreover, the prevalence of heterogeneous glycopeptide-intermediate S. aureus (hGISA) – a phenotype that has been associated with increased rates of treatment failure – improved from 25% in the earlier period to 6% during the later period, reported Dr. Huebner, head of the division of pediatric infectious diseases at the children’s hospital, part of the University of Munich.
Vancomycin MICs weren’t significantly different between the MRSA and MSSA samples.
Based upon this favorable institutional experience, vancomycin remains the first-line treatment for suspected severe gram-positive cocci infections as well as proven infections involving MRSA at Dr. von Hauner Children’s Hospital.
These vancomycin MIC and hGISA data underscore the importance of periodically monitoring local S. aureus antimicrobial susceptibilities, which, as in this case, can differ from the broader global trends. The vancomycin MIC creep issue hadn’t been studied previously in German hospitals, according to Dr. Huebner.
He and his coworkers have published details of the elements of pediatric antibiotic stewardship programs they have found to be most effective (Infection. 2017 Aug;45[4]:493-504) as well as a systematic review of studies on the favorable economic impact of such programs (J Hosp Infect. 2019 Aug;102[4]:369-376).
Dr. Huebner reported having no financial conflicts regarding his study, which was conducted free of commercial support.
REPORTING FROM ESPID 2019
Key clinical point: Staphylococcus aureus vancomycin MIC creep is reversible through dedicated antimicrobial stewardship.
Major finding: The prevalence of hGISA in MRSA and MSSA specimens improved from 25% during 2002-2009 to 6% during 2010-2017 at one German tertiary children’s hospital.
Study details: This was a retrospective single-center analysis of vancomycin resistance trends over time in 540 S. aureus specimens gathered in 2002-2017.
Disclosures: The presenter reported having no financial conflicts regarding this study, which was conducted free of commercial support.