Ricki Lewis, PhD

Fecal-oral transmission may be part of the COVID-19 clinical picture, according to two reports published in Gastroenterology. The researchers find that RNA and proteins from SARS-CoV-2, the viral cause of COVID-19, are shed in feces early in infection and persist after respiratory symptoms abate.

But the discovery is preliminary. “There is evidence of the virus in stool, but not evidence of infectious virus,” David A. Johnson, MD, professor of medicine and chief of gastroenterology at the Eastern Virginia School of Medicine in Norfolk, told Medscape Medical News.

The findings are not entirely unexpected. Both of the coronaviruses behind SARS and MERS are shed in stool, Jinyang Gu, MD, from Shanghai Jiao Tong University School of Medicine in Shanghai, China, and colleagues, note in one of the newly published articles.

In addition, as COVID-19 spread beyond China, clinicians began noticing initial mild gastrointestinal (GI) symptoms in some patients, including diarrhea, nausea, vomiting, and abdominal pain, preceding the hallmark fever, dry cough, and dyspnea. The first patient diagnosed in the United States with COVID-19 reported having 2 days of nausea and vomiting, with viral RNA detected in fecal and respiratory specimens, according to an earlier report.

Gu and colleagues warn that initial investigations would likely have not considered cases that manifested initially only as mild gastrointestinal symptoms.

Although early reports indicated that only about 10% of people with COVID-19 have GI symptoms, it isn’t known whether some infected individuals have only GI symptoms, Johnson said.

The GI manifestations are consistent with the distribution of ACE2 receptors, which serve as entry points for SARS-CoV-2, as well as SARS-CoV-1, which causes SARS. The receptors are most abundant in the cell membranes of lung AT2 cells, as well as in enterocytes in the ileum and colon.

“Altogether, many efforts should be made to be alert on the initial digestive symptoms of COVID-19 for early detection, early diagnosis, early isolation and early intervention,” Gu and colleagues conclude.

But Johnson cautions, “gastroenterologists are not the ones managing diagnosis of COVID-19. It is diagnosed as a respiratory illness, but we are seeing concomitant gastrointestinal shedding in stool and saliva, and GI symptoms.”
 

Samples From 73 Patients Studied

In the second article published, Fei Xiao, MD, of Sun Yat-sen University in Guangdong Province, China, and colleagues report detecting viral RNA in samples from the mouths, noses, throats, urine, and feces of 73 patients hospitalized during the first 2 weeks of February.

Of the 73 hospitalized patients, 39 (53.24%; 25 males and 14 females) had viral RNA in their feces, present from 1 to 12 days. Seventeen (23.29%) of the patients continued to have viral RNA in their stool after respiratory symptoms had improved.

One patient underwent endoscopy. There was no evidence of damage to the GI epithelium, but the clinicians detected slightly elevated levels of lymphocytes and plasma cells.

The researcher used laser scanning confocal microscopy to analyze samples taken during the endoscopy. They found evidence of both ACE2 receptors and viral nucleocapsid proteins in the gastric, duodenal, and rectal glandular epithelial cells.

Finding evidence of SARS-CoV-2 throughout the GI system, if not direct infectivity, suggests a fecal-oral route of transmission, the researchers conclude. “Our immunofluorescent data showed that ACE2 protein, a cell receptor for SARS-CoV-2, is abundantly expressed in the glandular cells of gastric, duodenal and rectal epithelia, supporting the entry of SARS-CoV-2 into the host cells.”

Detection of viral RNA at different time points in infection, they write, suggests that the virions are continually secreted and therefore likely infectious, which is under investigation. “Prevention of fecal-oral transmission should be taken into consideration to control the spread of the virus,” they write.

Current recommendations do not require that patients’ fecal samples be tested before being considered noninfectious. However, given their findings and evidence from other studies, Xiao and colleagues recommend that real-time reverse transcriptase-polymerase chain reaction (rRT-PCR) testing of fecal samples be added to current protocols.

Johnson offers practical suggestions based on the “potty hygiene” suggestions he gives to patients dealing with fecal shedding in Clostridioides difficile infection.

“To combat the microaerosolization of C. diff spores, I have patients do a complete bacteriocidal washing out of the toilet bowl, as well as clean surface areas and especially toothbrushes.” Keeping the bowl closed when not in use is important too in preventing “fecal-oral transmission of remnants” of toilet contents, he adds.

The new papers add to other reports suggesting that virus-bearing droplets may reach people in various ways, Johnson said. “Maybe the virus isn’t only spread by a cough or a sneeze.”

The researchers and commentator have disclosed no relevant financial relationships.

This article first appeared on Medscape.com.

Fecal-oral transmission may be part of the COVID-19 clinical picture, according to two reports published in Gastroenterology. The researchers find that RNA and proteins from SARS-CoV-2, the viral cause of COVID-19, are shed in feces early in infection and persist after respiratory symptoms abate.

But the discovery is preliminary. “There is evidence of the virus in stool, but not evidence of infectious virus,” David A. Johnson, MD, professor of medicine and chief of gastroenterology at the Eastern Virginia School of Medicine in Norfolk, told Medscape Medical News.

The findings are not entirely unexpected. Both of the coronaviruses behind SARS and MERS are shed in stool, Jinyang Gu, MD, from Shanghai Jiao Tong University School of Medicine in Shanghai, China, and colleagues, note in one of the newly published articles.

In addition, as COVID-19 spread beyond China, clinicians began noticing initial mild gastrointestinal (GI) symptoms in some patients, including diarrhea, nausea, vomiting, and abdominal pain, preceding the hallmark fever, dry cough, and dyspnea. The first patient diagnosed in the United States with COVID-19 reported having 2 days of nausea and vomiting, with viral RNA detected in fecal and respiratory specimens, according to an earlier report.

Gu and colleagues warn that initial investigations would likely have not considered cases that manifested initially only as mild gastrointestinal symptoms.

Although early reports indicated that only about 10% of people with COVID-19 have GI symptoms, it isn’t known whether some infected individuals have only GI symptoms, Johnson said.

The GI manifestations are consistent with the distribution of ACE2 receptors, which serve as entry points for SARS-CoV-2, as well as SARS-CoV-1, which causes SARS. The receptors are most abundant in the cell membranes of lung AT2 cells, as well as in enterocytes in the ileum and colon.

“Altogether, many efforts should be made to be alert on the initial digestive symptoms of COVID-19 for early detection, early diagnosis, early isolation and early intervention,” Gu and colleagues conclude.

But Johnson cautions, “gastroenterologists are not the ones managing diagnosis of COVID-19. It is diagnosed as a respiratory illness, but we are seeing concomitant gastrointestinal shedding in stool and saliva, and GI symptoms.”
 

Samples From 73 Patients Studied

In the second article published, Fei Xiao, MD, of Sun Yat-sen University in Guangdong Province, China, and colleagues report detecting viral RNA in samples from the mouths, noses, throats, urine, and feces of 73 patients hospitalized during the first 2 weeks of February.

Of the 73 hospitalized patients, 39 (53.24%; 25 males and 14 females) had viral RNA in their feces, present from 1 to 12 days. Seventeen (23.29%) of the patients continued to have viral RNA in their stool after respiratory symptoms had improved.

One patient underwent endoscopy. There was no evidence of damage to the GI epithelium, but the clinicians detected slightly elevated levels of lymphocytes and plasma cells.

The researcher used laser scanning confocal microscopy to analyze samples taken during the endoscopy. They found evidence of both ACE2 receptors and viral nucleocapsid proteins in the gastric, duodenal, and rectal glandular epithelial cells.

Finding evidence of SARS-CoV-2 throughout the GI system, if not direct infectivity, suggests a fecal-oral route of transmission, the researchers conclude. “Our immunofluorescent data showed that ACE2 protein, a cell receptor for SARS-CoV-2, is abundantly expressed in the glandular cells of gastric, duodenal and rectal epithelia, supporting the entry of SARS-CoV-2 into the host cells.”

Detection of viral RNA at different time points in infection, they write, suggests that the virions are continually secreted and therefore likely infectious, which is under investigation. “Prevention of fecal-oral transmission should be taken into consideration to control the spread of the virus,” they write.

Current recommendations do not require that patients’ fecal samples be tested before being considered noninfectious. However, given their findings and evidence from other studies, Xiao and colleagues recommend that real-time reverse transcriptase-polymerase chain reaction (rRT-PCR) testing of fecal samples be added to current protocols.

Johnson offers practical suggestions based on the “potty hygiene” suggestions he gives to patients dealing with fecal shedding in Clostridioides difficile infection.

“To combat the microaerosolization of C. diff spores, I have patients do a complete bacteriocidal washing out of the toilet bowl, as well as clean surface areas and especially toothbrushes.” Keeping the bowl closed when not in use is important too in preventing “fecal-oral transmission of remnants” of toilet contents, he adds.

The new papers add to other reports suggesting that virus-bearing droplets may reach people in various ways, Johnson said. “Maybe the virus isn’t only spread by a cough or a sneeze.”

The researchers and commentator have disclosed no relevant financial relationships.

This article first appeared on Medscape.com.

Fecal-oral transmission may be part of the COVID-19 clinical picture, according to two reports published in Gastroenterology. The researchers find that RNA and proteins from SARS-CoV-2, the viral cause of COVID-19, are shed in feces early in infection and persist after respiratory symptoms abate.

But the discovery is preliminary. “There is evidence of the virus in stool, but not evidence of infectious virus,” David A. Johnson, MD, professor of medicine and chief of gastroenterology at the Eastern Virginia School of Medicine in Norfolk, told Medscape Medical News.

The findings are not entirely unexpected. Both of the coronaviruses behind SARS and MERS are shed in stool, Jinyang Gu, MD, from Shanghai Jiao Tong University School of Medicine in Shanghai, China, and colleagues, note in one of the newly published articles.

In addition, as COVID-19 spread beyond China, clinicians began noticing initial mild gastrointestinal (GI) symptoms in some patients, including diarrhea, nausea, vomiting, and abdominal pain, preceding the hallmark fever, dry cough, and dyspnea. The first patient diagnosed in the United States with COVID-19 reported having 2 days of nausea and vomiting, with viral RNA detected in fecal and respiratory specimens, according to an earlier report.

Gu and colleagues warn that initial investigations would likely have not considered cases that manifested initially only as mild gastrointestinal symptoms.

Although early reports indicated that only about 10% of people with COVID-19 have GI symptoms, it isn’t known whether some infected individuals have only GI symptoms, Johnson said.

The GI manifestations are consistent with the distribution of ACE2 receptors, which serve as entry points for SARS-CoV-2, as well as SARS-CoV-1, which causes SARS. The receptors are most abundant in the cell membranes of lung AT2 cells, as well as in enterocytes in the ileum and colon.

“Altogether, many efforts should be made to be alert on the initial digestive symptoms of COVID-19 for early detection, early diagnosis, early isolation and early intervention,” Gu and colleagues conclude.

But Johnson cautions, “gastroenterologists are not the ones managing diagnosis of COVID-19. It is diagnosed as a respiratory illness, but we are seeing concomitant gastrointestinal shedding in stool and saliva, and GI symptoms.”
 

Samples From 73 Patients Studied

In the second article published, Fei Xiao, MD, of Sun Yat-sen University in Guangdong Province, China, and colleagues report detecting viral RNA in samples from the mouths, noses, throats, urine, and feces of 73 patients hospitalized during the first 2 weeks of February.

Of the 73 hospitalized patients, 39 (53.24%; 25 males and 14 females) had viral RNA in their feces, present from 1 to 12 days. Seventeen (23.29%) of the patients continued to have viral RNA in their stool after respiratory symptoms had improved.

One patient underwent endoscopy. There was no evidence of damage to the GI epithelium, but the clinicians detected slightly elevated levels of lymphocytes and plasma cells.

The researcher used laser scanning confocal microscopy to analyze samples taken during the endoscopy. They found evidence of both ACE2 receptors and viral nucleocapsid proteins in the gastric, duodenal, and rectal glandular epithelial cells.

Finding evidence of SARS-CoV-2 throughout the GI system, if not direct infectivity, suggests a fecal-oral route of transmission, the researchers conclude. “Our immunofluorescent data showed that ACE2 protein, a cell receptor for SARS-CoV-2, is abundantly expressed in the glandular cells of gastric, duodenal and rectal epithelia, supporting the entry of SARS-CoV-2 into the host cells.”

Detection of viral RNA at different time points in infection, they write, suggests that the virions are continually secreted and therefore likely infectious, which is under investigation. “Prevention of fecal-oral transmission should be taken into consideration to control the spread of the virus,” they write.

Current recommendations do not require that patients’ fecal samples be tested before being considered noninfectious. However, given their findings and evidence from other studies, Xiao and colleagues recommend that real-time reverse transcriptase-polymerase chain reaction (rRT-PCR) testing of fecal samples be added to current protocols.

Johnson offers practical suggestions based on the “potty hygiene” suggestions he gives to patients dealing with fecal shedding in Clostridioides difficile infection.

“To combat the microaerosolization of C. diff spores, I have patients do a complete bacteriocidal washing out of the toilet bowl, as well as clean surface areas and especially toothbrushes.” Keeping the bowl closed when not in use is important too in preventing “fecal-oral transmission of remnants” of toilet contents, he adds.

The new papers add to other reports suggesting that virus-bearing droplets may reach people in various ways, Johnson said. “Maybe the virus isn’t only spread by a cough or a sneeze.”

The researchers and commentator have disclosed no relevant financial relationships.

This article first appeared on Medscape.com.

Patients who did not survive hospitalization for COVID-19 in Wuhan were more likely to be older, have comorbidities, and elevated D-dimer, according to the first study to examine risk factors associated with death among adults hospitalized with COVID-19. “Older age, showing signs of sepsis on admission, underlying diseases like high blood pressure and diabetes, and the prolonged use of noninvasive ventilation were important factors in the deaths of these patients,” coauthor Zhibo Liu said in a news release. Abnormal blood clotting was part of the clinical picture too.

Fei Zhou, MD, from the Chinese Academy of Medical Sciences, and colleagues conducted a retrospective, observational, multicenter cohort study of 191 patients, 137 of whom were discharged and 54 of whom died in the hospital.

The study, published online today in The Lancet, included all adult inpatients with laboratory-confirmed COVID-19 from Jinyintan Hospital and Wuhan Pulmonary Hospital who had been discharged or died by January 31 of this year. Severely ill patients in the province were transferred to these hospitals until February 1.

The researchers compared demographic, clinical, treatment, and laboratory data from electronic medical records between survivors and those who succumbed to the disease. The analysis also tested serial samples for viral RNA. Overall, 91 (48%) of the 191 patients had comorbidity. Most common was hypertension (30%), followed by diabetes (19%) and coronary heart disease (8%).

The odds of dying in the hospital increased with age (odds ratio 1.10; 95% confidence interval, 1.03-1.17; per year increase in age), higher Sequential Organ Failure Assessment (SOFA) score (5.65, 2.61-12.23; P < .0001), and D-dimer level exceeding 1 mcg/L on admission. The SOFA was previously called the “sepsis-related organ failure assessment score” and assesses rate of organ failure in intensive care units. Elevated D-dimer indicates increased risk of abnormal blood clotting, such as deep vein thrombosis.

Nonsurvivors compared with survivors had higher frequencies of respiratory failure (98% vs 36%), sepsis (100%, vs 42%), and secondary infections (50% vs 1%).

The average age of survivors was 52 years compared to 69 for those who died. Liu cited weakening of the immune system and increased inflammation, which damages organs and also promotes viral replication, as explanations for the age effect.

From the time of initial symptoms, median time to discharge from the hospital was 22 days. Average time to death was 18.5 days.

Fever persisted for a median of 12 days among all patients, and cough persisted for a median 19 days; 45% of the survivors were still coughing on discharge. In survivors, shortness of breath improved after 13 days, but persisted until death in the others.

Viral shedding persisted for a median duration of 20 days in survivors, ranging from 8 to 37. The virus (SARS-CoV-2) was detectable in nonsurvivors until death. Antiviral treatment did not curtail viral shedding.

But the viral shedding data come with a caveat. “The extended viral shedding noted in our study has important implications for guiding decisions around isolation precautions and antiviral treatment in patients with confirmed COVID-19 infection. However, we need to be clear that viral shedding time should not be confused with other self-isolation guidance for people who may have been exposed to COVID-19 but do not have symptoms, as this guidance is based on the incubation time of the virus,” explained colead author Bin Cao.

“Older age, elevated D-dimer levels, and high SOFA score could help clinicians to identify at an early stage those patients with COVID-19 who have poor prognosis. Prolonged viral shedding provides the rationale for a strategy of isolation of infected patients and optimal antiviral interventions in the future,” the researchers conclude.

A limitation in interpreting the findings of the study is that hospitalized patients do not represent the entire infected population. The researchers caution that “the number of deaths does not reflect the true mortality of COVID-19.” They also note that they did not have enough genetic material to accurately assess duration of viral shedding.

This article first appeared on Medscape.com.

Patients who did not survive hospitalization for COVID-19 in Wuhan were more likely to be older, have comorbidities, and elevated D-dimer, according to the first study to examine risk factors associated with death among adults hospitalized with COVID-19. “Older age, showing signs of sepsis on admission, underlying diseases like high blood pressure and diabetes, and the prolonged use of noninvasive ventilation were important factors in the deaths of these patients,” coauthor Zhibo Liu said in a news release. Abnormal blood clotting was part of the clinical picture too.

Fei Zhou, MD, from the Chinese Academy of Medical Sciences, and colleagues conducted a retrospective, observational, multicenter cohort study of 191 patients, 137 of whom were discharged and 54 of whom died in the hospital.

The study, published online today in The Lancet, included all adult inpatients with laboratory-confirmed COVID-19 from Jinyintan Hospital and Wuhan Pulmonary Hospital who had been discharged or died by January 31 of this year. Severely ill patients in the province were transferred to these hospitals until February 1.

The researchers compared demographic, clinical, treatment, and laboratory data from electronic medical records between survivors and those who succumbed to the disease. The analysis also tested serial samples for viral RNA. Overall, 91 (48%) of the 191 patients had comorbidity. Most common was hypertension (30%), followed by diabetes (19%) and coronary heart disease (8%).

The odds of dying in the hospital increased with age (odds ratio 1.10; 95% confidence interval, 1.03-1.17; per year increase in age), higher Sequential Organ Failure Assessment (SOFA) score (5.65, 2.61-12.23; P < .0001), and D-dimer level exceeding 1 mcg/L on admission. The SOFA was previously called the “sepsis-related organ failure assessment score” and assesses rate of organ failure in intensive care units. Elevated D-dimer indicates increased risk of abnormal blood clotting, such as deep vein thrombosis.

Nonsurvivors compared with survivors had higher frequencies of respiratory failure (98% vs 36%), sepsis (100%, vs 42%), and secondary infections (50% vs 1%).

The average age of survivors was 52 years compared to 69 for those who died. Liu cited weakening of the immune system and increased inflammation, which damages organs and also promotes viral replication, as explanations for the age effect.

From the time of initial symptoms, median time to discharge from the hospital was 22 days. Average time to death was 18.5 days.

Fever persisted for a median of 12 days among all patients, and cough persisted for a median 19 days; 45% of the survivors were still coughing on discharge. In survivors, shortness of breath improved after 13 days, but persisted until death in the others.

Viral shedding persisted for a median duration of 20 days in survivors, ranging from 8 to 37. The virus (SARS-CoV-2) was detectable in nonsurvivors until death. Antiviral treatment did not curtail viral shedding.

But the viral shedding data come with a caveat. “The extended viral shedding noted in our study has important implications for guiding decisions around isolation precautions and antiviral treatment in patients with confirmed COVID-19 infection. However, we need to be clear that viral shedding time should not be confused with other self-isolation guidance for people who may have been exposed to COVID-19 but do not have symptoms, as this guidance is based on the incubation time of the virus,” explained colead author Bin Cao.

“Older age, elevated D-dimer levels, and high SOFA score could help clinicians to identify at an early stage those patients with COVID-19 who have poor prognosis. Prolonged viral shedding provides the rationale for a strategy of isolation of infected patients and optimal antiviral interventions in the future,” the researchers conclude.

A limitation in interpreting the findings of the study is that hospitalized patients do not represent the entire infected population. The researchers caution that “the number of deaths does not reflect the true mortality of COVID-19.” They also note that they did not have enough genetic material to accurately assess duration of viral shedding.

This article first appeared on Medscape.com.

Patients who did not survive hospitalization for COVID-19 in Wuhan were more likely to be older, have comorbidities, and elevated D-dimer, according to the first study to examine risk factors associated with death among adults hospitalized with COVID-19. “Older age, showing signs of sepsis on admission, underlying diseases like high blood pressure and diabetes, and the prolonged use of noninvasive ventilation were important factors in the deaths of these patients,” coauthor Zhibo Liu said in a news release. Abnormal blood clotting was part of the clinical picture too.

Fei Zhou, MD, from the Chinese Academy of Medical Sciences, and colleagues conducted a retrospective, observational, multicenter cohort study of 191 patients, 137 of whom were discharged and 54 of whom died in the hospital.

The study, published online today in The Lancet, included all adult inpatients with laboratory-confirmed COVID-19 from Jinyintan Hospital and Wuhan Pulmonary Hospital who had been discharged or died by January 31 of this year. Severely ill patients in the province were transferred to these hospitals until February 1.

The researchers compared demographic, clinical, treatment, and laboratory data from electronic medical records between survivors and those who succumbed to the disease. The analysis also tested serial samples for viral RNA. Overall, 91 (48%) of the 191 patients had comorbidity. Most common was hypertension (30%), followed by diabetes (19%) and coronary heart disease (8%).

The odds of dying in the hospital increased with age (odds ratio 1.10; 95% confidence interval, 1.03-1.17; per year increase in age), higher Sequential Organ Failure Assessment (SOFA) score (5.65, 2.61-12.23; P < .0001), and D-dimer level exceeding 1 mcg/L on admission. The SOFA was previously called the “sepsis-related organ failure assessment score” and assesses rate of organ failure in intensive care units. Elevated D-dimer indicates increased risk of abnormal blood clotting, such as deep vein thrombosis.

Nonsurvivors compared with survivors had higher frequencies of respiratory failure (98% vs 36%), sepsis (100%, vs 42%), and secondary infections (50% vs 1%).

The average age of survivors was 52 years compared to 69 for those who died. Liu cited weakening of the immune system and increased inflammation, which damages organs and also promotes viral replication, as explanations for the age effect.

From the time of initial symptoms, median time to discharge from the hospital was 22 days. Average time to death was 18.5 days.

Fever persisted for a median of 12 days among all patients, and cough persisted for a median 19 days; 45% of the survivors were still coughing on discharge. In survivors, shortness of breath improved after 13 days, but persisted until death in the others.

Viral shedding persisted for a median duration of 20 days in survivors, ranging from 8 to 37. The virus (SARS-CoV-2) was detectable in nonsurvivors until death. Antiviral treatment did not curtail viral shedding.

But the viral shedding data come with a caveat. “The extended viral shedding noted in our study has important implications for guiding decisions around isolation precautions and antiviral treatment in patients with confirmed COVID-19 infection. However, we need to be clear that viral shedding time should not be confused with other self-isolation guidance for people who may have been exposed to COVID-19 but do not have symptoms, as this guidance is based on the incubation time of the virus,” explained colead author Bin Cao.

“Older age, elevated D-dimer levels, and high SOFA score could help clinicians to identify at an early stage those patients with COVID-19 who have poor prognosis. Prolonged viral shedding provides the rationale for a strategy of isolation of infected patients and optimal antiviral interventions in the future,” the researchers conclude.

A limitation in interpreting the findings of the study is that hospitalized patients do not represent the entire infected population. The researchers caution that “the number of deaths does not reflect the true mortality of COVID-19.” They also note that they did not have enough genetic material to accurately assess duration of viral shedding.

This article first appeared on Medscape.com.