The Journal of Family Practice

Except for a drop in the number of sexually transmitted infections (STIs) early in the COVID-19 pandemic (March and April 2020), the incidence of STIs has been rising throughout this century.¹ In 2018, 1 in 5 people in the United States had an STI; 26 million new cases were reported that year, resulting in direct costs of $16 billion—85% of which was for the care of HIV infection.² Also that year, infection with Chlamydia trachomatis (chlamydia), Trichomonas vaginalis (trichomoniasis), herpesvirus type 2 (genital herpes), and/or human papillomavirus (condylomata acuminata) constituted 97.6% of all prevalent and 93.1% of all incident STIs.³ Almost half (45.5%) of new cases of STIs occur in people between the ages of 15 and 24 years.³

Three factors—changing social patterns, including the increase of social networking; the ability of antiviral therapy to decrease the spread of HIV, leading to a reduction in condom use; and increasing antibiotic resistance—have converged to force changes in screening and treatment recommendations. In this article, we summarize updated guidance for primary care clinicians from several sources—including the Centers for Disease Control and Prevention (CDC), the US Preventive Services Task Force (USPSTF), and the American Society for Colposcopy and Cervical Pathology (ASCCP)—on diagnosing STIs (TABLE 1^4-13) and providing guideline-based treatment ­(Table 2¹⁴). Because of the breadth and complexity of HIV disease, it is not addressed here.

Chlamydia

Infection with Chlamydia trachomatis—the most commonly reported bacterial STI in the United States—primarily causes cervicitis in women and proctitis in men, and can cause urethritis and pharyngitis in men and women. Prevalence is highest in sexually active people younger than 24 years.¹⁵

Because most infected people are asymptomatic and show no signs of illness on physical exam, screening is recommended for all sexually active women younger than 25 years and all men who have sex with men (MSM).⁴ No studies have established proper screening intervals; a reasonable approach, therefore, is to repeat screening for patients who have a sexual history that confers a new or persistent risk for infection since their last negative result.

Depending on the location of the infection, symptoms of chlamydia can include vaginal or penile irritation or discharge, dysuria, pelvic or rectal pain, and sore throat. Breakthrough bleeding in a patient who is taking an oral contraceptive should raise suspicion for chlamydia.

Untreated chlamydia can lead to pelvic inflammatory disease (PID), tubo-ovarian abscess, tubal factor infertility, ectopic pregnancy, and chronic pelvic pain. Infection can be transmitted vertically (mother to baby) antenatally, which can cause ophthalmia neonatorum and pneumonia in these newborns.

Diagnosis. The diagnosis of chlamydia is made using nucleic acid amplification testing (NAAT). Specimens can be collected by the clinician or the patient (self collected) using a vaginal, rectal, or oropharyngeal swab, or a combination of these, and can be obtained from urine or liquid-based cytology material.¹⁶

Continue to: Treatment

Treatment. Recommendations for treating chlamydia were updated by the CDC in its 2021 treatment guidelines (Table 2¹⁴). Doxycycline 100 mg bid for 7 days is the preferred regimen; alternative regiments are (1) azithromycin 1 g in a single dose and (2) levofloxacin 500 mg daily for 7 days.⁴ A meta-analysis¹⁷ and a Cochrane review¹⁸ showed that the rate of treatment failure was higher among men when they were treated with azithromycin instead of doxycycline; furthermore, a randomized controlled trial demonstrated that doxycycline is more effective than azithromycin (cure rate, 100%, compared to 74%) at treating rectal chlamydia in MSM.¹⁹

Azithromycin is efficacious for urogenital infection in women; however, there is concern that the 33% to 83% of women who have concomitant rectal infection (despite reporting no receptive anorectal sexual activity) would be insufficiently treated. Outside pregnancy, the CDC does not recommend a test of cure but does recommend follow-up testing for reinfection in 3 months. Patients should abstain from sexual activity until 7 days after all sexual partners have been treated.

Expedited partner therapy (EPT) is the practice of treating sexual partners of patients with known chlamydia (and patients with gonococcal infection). Unless prohibited by law in your state, offer EPT to patients with chlamydia if they cannot ensure that their sexual partners from the past 60 days will seek timely treatment.^a

Breakthrough bleeding in a patient who is taking an oral contraceptive should raise suspicion for chlamydia.

Evidence to support EPT comes from 3 US clinical trials, whose subjects comprised heterosexual men and women with chlamydia or gonorrhea.^21-23 The role of EPT for MSM is unclear; data are limited. Shared ­decision-making is recommended to determine whether EPT should be provided, to ensure that co-infection with other bacterial STIs (eg, syphilis) or HIV is not missed.^24-26

^a Visit www.cdc.gov/std/ept to read updated information about laws and regulations regarding EPT in your state.²⁰

Gonorrhea

Gonorrhea is the second most-reported bacterial communicable disease.⁵ Infection with Neisseria gonorrhoeae causes urethral discharge in men, leading them to seek treatment; infected women, however, are often asymptomatic. Infected men and women might not recognize symptoms until they have transmitted the disease. Women have a slower natural clearance of gonococcal infection, which might explain their higher prevalence.²⁷ Delayed recognition of symptoms can result in complications, including PID.⁵

Diagnosis. Specimens for NAAT can be obtained from urine, endocervical, vaginal, rectal, pharyngeal, and male urethral specimens. Reported sexual behaviors and exposures of women and transgender or gender-diverse people should be taken into consideration to determine whether rectal or pharyngeal testing, or both, should be performed.²⁸ MSM should be screened annually at sites of contact, including the urethra, rectum, and pharynx.²⁸ All patients with urogenital or rectal gonorrhea should be asked about oral sexual exposure; if reported, pharyngeal testing should be performed.⁵

NAAT of urine is at least as sensitive as testing of an endocervical specimen; the same specimen can be used to test for chlamydia and gonorrhea. Patient-collected specimens are a reasonable alternative to clinician-collected swab specimens.²⁹

Continue to: Treatment

Treatment is complicated by the ability of gonorrhea to develop resistance. Intramuscular ceftriaxone 500 mg in a single dose cures 98% to 99% of infections in the United States; however, monitoring local resistance patterns in the community is an important component of treatment.²⁸ (See Table 2¹⁴ for an alternative regimen for cephalosporin-allergic patients and for treating gonococcal conjunctivitis and disseminated infection.)

Unless prohibited by law in your state, offer expedited partner therapy to patients with chlamydia if they cannot ensure that their sexual partners from the past 60 days will seek timely treatment.

In 2007, the CDC identified widespread quinolone-resistant gonococcal strains; therefore, fluoroquinolones no longer are recommended for treating gonorrhea.³⁰ Cefixime has demonstrated only limited success in treating pharyngeal gonorrhea and does not attain a bactericidal level as high as ceftriaxone does; cefixime therefore is recommended only if ceftriaxone is unavailable.²⁸ The national Gonococcal Isolate Surveillance Project is finding emerging evidence of the reduced susceptibility of N gonorrhoeae to azithromycin—making dual therapy for gonococcal infection no longer a recommendation.²⁸

Patients should abstain from sex until 7 days after all sex partners have been treated for gonorrhea. As with chlamydia, the CDC does not recommend a test of cure for uncomplicated urogenital or rectal gonorrhea unless the patient is pregnant, but does recommend testing for reinfection 3 months after treatment.¹⁴ For patients with pharyngeal gonorrhea, a test of cure is recommended 7 to 14 days after initial treatment, due to challenges in treatment and because this site of infection is a potential source of antibiotic resistance.²⁸

Trichomoniasis

T vaginalis, the most common nonviral STI worldwide,³¹ can manifest as a yellow-green vaginal discharge with or without vaginal discomfort, dysuria, epididymitis, and prostatitis; most cases, however, are asymptomatic. On examination, the cervix might be erythematous with punctate lesions (known as strawberry cervix).

Unlike most STIs, trichomoniasis is as common in women older than 24 years as it is in younger women. Infection is associated with a lower educational level, lower socioeconomic status, and having ≥ 2 sexual partners in the past year.³² Prevalence is approximately 10 times as high in Black women as it is in White women.

T vaginalis infection is associated with an increase in the risk for preterm birth, premature rupture of membranes, cervical cancer, and HIV infection. With a lack of high-quality clinical trials on the efficacy of screening, women with HIV are the only group for whom routine screening is recommended.⁶

Diagnosis. NAAT for trichomoniasis is now available in conjunction with gonorrhea and chlamydia testing of specimens on vaginal or urethral swabs and of urine specimens and liquid Pap smears.

Continue to: Treatment

Treatment. Because of greater efficacy, the treatment recommendation for women has changed from a single 2-g dose of oral metronidazole to 500 mg twice daily for 7 days. The 2-g single oral dose is still recommended for men⁷ (Table 2¹⁴ lists alternative regimens).

Mycoplasma genitalium

Infection with M genitalium is common and often asymptomatic. The disease causes approximately 20% of all cases of nongonococcal and nonchlamydial urethritis in men and about 40% of persistent or recurrent infections. M genitalium is present in approximately 20% of women with cervicitis and has been associated with PID, preterm delivery, spontaneous abortion, and infertility.

There are limited and conflicting data regarding outcomes in infected patients other than those with persistent or recurrent infection; furthermore, resistance to azithromycin is increasing rapidly, resulting in an increase in treatment failures. Screening therefore is not recommended, and testing is recommended only in men with nongonococcal urethritis.^33,34

Diagnosis. NAAT can be performed on urine or on a urethral, penile meatal, endocervical, or vaginal swab; men with recurrent urethritis or women with recurrent cervicitis should be tested. NAAT also can be considered in women with PID. Testing the specimen for the microorganism’s resistance to macrolide antibiotics is recommended (if such testing is available).

Treatment is initiated with doxycycline 100 mg twice daily for 7 days. If the organism is macrolide sensitive, follow with azithromycin 1 g orally on Day 1, then 500 mg/d for 3 more days. If the organism is macrolide resistant or testing is unavailable, follow doxycycline with oral moxifloxacin 400 mg/d for 7 days.³³

Genital herpes (mostly herpesvirus type 2)

Genital herpes, characterized by painful, recurrent outbreaks of genital and anal lesions,³⁵ is a lifelong infection that increases in prevalence with age.⁸ Because many infected people have disease that is undiagnosed or mild or have unrecognizable symptoms during viral shedding, most genital herpes infections are transmitted by people who are unaware that they are contagious.³⁶ Herpesvirus type 2 (HSV-2) causes most cases of genital herpes, although an increasing percentage of cases are attributed to HSV type 1 (HSV-1) through receptive oral sex from a person who has an oral HSV-1 lesion.

Intramuscular ceftriaxone 500 mg in a single dose cures 98% to 99% of gonococcal infections in the United States; monitoring local resistance patterns in the community is important.

Importantly, HSV-2–infected people are 2 to 3 times more likely to become infected with HIV than people who are not HSV-2 infected.³⁷ This is becauseCD4+ T cells concentrate at the site of HSV lesions and express a higher level of cell-surface receptors that HIV uses to enter cells. HIV replicates 3 to 5 times more quickly in HSV-infected tissue.³⁸

Continue to: HSV can become disseminated...

HSV can become disseminated, particularly in immunosuppressed people, and can manifest as encephalitis, hepatitis, and pneumonitis. Beyond its significant burden on health, HSV carries significant psychosocial consequences.⁹

Diagnosis. Clinical diagnosis can be challenging if classic lesions are absent at evaluation. If genital lesions are present, HSV can be identified by NAAT or culture of a specimen of those lesions. False-negative antibody results might be more frequent in early stages of infection; repeating antibody testing 12 weeks after presumed time of acquisition might therefore be indicated, based on clinical judgment. HSV-2 antibody positivity implies anogenital infection because almost all HSV-2 infections are sexually acquired.

HSV-1 antibody positivity alone is more difficult to interpret because this finding does not distinguish between oral and genital lesions, and most HSV-1 seropositivity is acquired during childhood.³⁶ HSV polymerase chain reaction (PCR) testing of blood should not be performed to diagnose genital herpes infection, except in settings in which there is concern about disseminated infection.

Treatment. Management should address the acute episode and the chronic nature of genital herpes. Antivirals will not eradicate latent virus; rather, the goals of treatment are to:

• attenuate current infection
• prevent recurrence
• improve quality of life
• suppress the virus to prevent transmission to sexual partners.

All patients experiencing an initial episode of genital herpes should be treated, regardless of symptoms, due to the potential for prolonged or severe symptoms during recurrent episodes.⁹ Three drugs—acyclovir, valacyclovir, and famciclovir—are approved by the US Food and Drug Administration (FDA) to treat genital herpes and appear equally effective (TABLE 2¹⁴).

Antiviral therapy for recurrent genital HSV infection can be administered either as suppressive therapy to reduce the frequency of recurrences or episodically to shorten the duration of lesions:

• Suppressive therapy reduces the frequency of recurrence by 70% to 80% among patients with frequent outbreaks. Long-term safety and efficacy are well established.
• Episodic therapy is most effective if started within 1 day after onset of lesions or during the prodrome.³⁶

There is no specific recommendation for when to choose suppressive over episodic therapy; most patients prefer suppressive therapy because it improves quality of life. Use shared clinical decision-making to determine the best option for an individual patient.

Continue to: Human papillomavirus

Condylomata acuminata (genital warts) are caused by human papillomavirus (HPV), most commonly types 6 and 11, which manifest as soft papules or plaques on the external genitalia, perineum, perianal skin, and groin. The warts are usually asymptomatic but can be painful or pruritic, depending on size and location.

Diagnosis is made by visual inspection and can be confirmed by biopsy if lesions are atypical. Lesions can resolve spontaneously, remain unchanged, or grow in size or number.

Treatment. The aim of treatment is relief of symptoms and removal of warts. Treatment does not eradicate HPV infection. Multiple treatments are available that can be applied by the patient as a cream, gel, or ointment or administered by the provider, including cryotherapy, surgical removal, and solutions. The decision on how to treat should be based on the number, size, and location of lesions; patient preference; cost; convenience; and the modality’s adverse effects (TABLE 2¹⁴).

HPV-associated cancers and precancers. This is a broad (and separate) topic. HPV types 16 and 18 cause most cases of cervical, penile, vulvar, vaginal, anal, and oropharyngeal cancer and precancer.³⁹ The USPSTF, the American Cancer Society, and the American College of Obstetricians and Gynecologists all have recommendations for cervical cancer screening in the United States.⁴⁰ Refer to guidelines of the ASCCP for recommendations on abnormal screening tests.⁴¹

Prevention of genital warts. The 9-­valent HPV vaccine available in the United States is safe and effective and helps protect against viral types 6, 11, 16, 18, 31, 33, 45, 52, and 58. Types 6 and 11 are the principal causes of genital warts. Types 16 and 18 cause 66% of cervical cancer. The vaccination series can be started at age 9 years and is recommended for everyone through age 26 years. Only 2 doses are needed if the first dose is given prior to age 15 years; given after that age, a 3-dose series is utilized. Refer to CDC vaccine guidelines⁴² for details on the exact timing of vaccination.

Trichomoniasis can manifest as a yellowgreen vaginal discharge with or without vaginal discomfort, dysuria, epididymitis, and prostatitis; most cases, however, are asymptomatic.

Vaccination for women ages 27 to 45 years is not universally recommended because most people have been exposed to HPV by that age. However, the vaccine can still be administered, depending on clinical circumstances and the risk for new infection.⁴²

Syphilis

Caused by the spirochete Treponema pallidum, syphilis manifests across a spectrum—from congenital to tertiary. The inability of medical science to develop a method for culturing the spirochete has confounded diagnosis and treatment.

Continue to: Since reaching a historic...

Since reaching a historic nadir of incidence in 2000 (5979 cases in the United States), there has been an increasingly rapid rise in that number: to 130,000 in 2020. More than 50% of cases are in MSM; however, the number of cases in heterosexual women is rapidly increasing.⁴³

Routine screening for syphilis should be performed in any person who is at risk: all pregnant women in the first trimester (and in the third trimester and at delivery if they are at risk or live in a community where prevalence is high) and annually in sexually active MSM or anyone with HIV infection.¹⁰

Diagnosis. Examination by dark-field microscopy, testing by PCR, and direct fluorescent antibody assay for T pallidum from lesion tissue or exudate provide definitive diagnosis for early and congenital syphilis, but are often unavailable.

Presumptive diagnosis requires 2 serologic tests:

• Nontreponemal tests (the VDRL and rapid plasma reagin tests) identify anticardiolipin antibodies released during syphilis infection, although results also can be elevated in autoimmune disease or after certain immunizations, including the COVID-19 vaccine.
• Treponemal tests (the fluorescent treponemal antibody absorbed assay, T pallidum particulate agglutination assay, enzyme immunoassay, and chemiluminescence immunoassay) are specific antibody tests.

Historically, reactive nontreponemal tests, which are less expensive and easier to perform, were followed by a treponemal test to confirm the presumptive diagnosis. This method continues to be reasonable when screening patients in a low-prevalence population.¹¹ The reverse sequence screening algorithm (ie, begin with a treponemal test) is now frequently used. With this method, a positive treponemal test must be confirmed with a nontreponemal test. If the treponemal test is positive and the nontreponemal test is negative, another treponemal test must be positive to confirm the diagnosis. This algorithm is useful in high-risk populations because it provides earlier detection of recently acquired syphilis and enhanced detection of late latent syphilis.^12,13,44 The CDC has not stated a diagnostic preference.

Once the diagnosis is made, a complete history (including a sexual history and a history of syphilis testing and treatment) and a physical exam are necessary to confirm stage of disease.⁴⁵

Special circumstances. Neurosyphilis, ocular syphilis, and otosyphilis refer to the site of infection and can occur at any stage of disease. The nervous system usually is infected within hours of initial infection, but symptoms might take weeks or years to ­develop—or might never manifest. Any time a patient develops neurologic, ophthalmologic, or audiologic symptoms, careful neurologic and ophthalmologic evaluation should be performed and the patient should be tested for HIV.

Continue to: Lumbar puncture is warranted...

Lumbar puncture is warranted for evaluation of cerebrospinal fluid if neurologic symptoms are present but is not necessary for isolated ocular syphilis or otosyphilis without neurologic findings. Treatment should not be delayed for test results if ocular syphilis is suspected because permanent blindness can develop. Any patient at high risk for an STI who presents with neurologic or ophthalmologic symptoms should be tested for syphilis and HIV.⁴⁵

Pregnant women who have a diagnosis of syphilis should be treated with penicillin immediately because treatment ≥ 30 days prior to delivery is likely to prevent most ­cases of congenital syphilis. However, a course of penicillin might not prevent stillbirth or congenital syphilis in a gravely infected fetus, evidenced by fetal syphilis on a sonogram at the time of treatment. Additional doses of penicillin in pregnant women with early syphilis might be indicated if there is evidence of ­fetal syphilis on ultrasonography. All women who deliver a stillborn infant (≥ 20 weeks’ ­gestation) should be tested for syphilis at ­delivery.⁴⁶

All patients in whom primary or secondary syphilis has been diagnosed should be tested for HIV at the time of diagnosis and treatment; if the result is negative, they should be offered preexposure prophylaxis (PrEP; discussed shortly). If the incidence of HIV in your community is high, repeat testing for HIV in 3 months. Clinical and serologic evaluation should be performed 6 and 12 months after treatment.⁴⁷

Treatment. Penicillin remains the standard treatment for syphilis. Primary, secondary, and early tertiary stages (including in pregnancy) are treated with benzathine penicillin G 2.4 million units intramuscular (IM) in a single dose. For pregnant patients, repeating that dose in 1 week generally is recommended. Patients in the late latent (> 1 year) or tertiary stage receive the same dose of penicillin, which is then repeated weekly, for a total of 3 doses. Doxycycline and ceftriaxone are alternatives, except in ­pregnancy.

Antivirals will not eradicate latent herpesvirus; rather, the goals of treatment are to attenuate current infection, prevent recurrence, and improve quality of life.

Warn patients of the Jarisch-Herxheimer reaction: fever, headache, and myalgias associated with initiation of treatment in the presence of the high bacterial load seen in early syphilis. Treatment is symptomatic, but the Jarisch-Herxheimer reaction can cause fetal distress in pregnancy.

Otosyphilis, ocular syphilis, and neurosyphilis require intravenous (IV) aqueous crystalline penicillin G 3 to 4 million U every 4 hours for 10 to 14 days.⁴⁵ Alternatively, procaine penicillin G 2.4 million U/d IM can be given daily with oral probenecid 500 mg qid, both for 10 to 14 days (TABLE 2¹⁴).

Screening andprevention of STIs

Screening recommendations

Follow USPSTF screening guidelines for STIs.^10,48-54 Screen annually for:

• gonorrhea and chlamydia in women ages 15 to 24 years and in women older than 25 years if they are at increased risk
• gonorrhea, chlamydia, syphilis, and HIV in MSM, and hepatitis C if they are HIV positive
• trichomoniasis in women who are HIV positive.

Continue to: Consider the community in which...

Vaccination against human papillomavirus is not universally recommended for women ages 27 to 45 years because most people have been exposed to HPV by that age.

Consider the community in which you practice when determining risk; you might want to consult local public health authorities for information about local epidemiology and guidance on determining which of your patients are at increased risk.

Preexposure prophylaxis

According to the CDC, all sexually active adults and adolescents should be informed about the availability of PrEP to prevent HIV infection. PrEP should be (1) available to anyone who requests it and (2) recommended for anyone who is sexually active and who practices sexual behaviors that place them at substantial risk for exposure to or acquisition of HIV, or both.

The recommended treatment protocol for men and women who have either an HIV-positive partner or inconsistent condom use or who have had a bacterial STI in the previous 6 months is oral emtricitabine 200 mg plus tenofovir disoproxil fumarate 300 mg/d (sold as Truvada-F/TDF). Men and transgender women (ie, assigned male at birth) with at-risk behaviors also can use emtricitabine plus tenofovir alafenamide 25 mg/d (sold as Descovy-F/TAF).

In addition, cabotegravir plus rilpirivine (sold as Cabenuva), IM every 2 months, was approved by the FDA for PrEP in 2021.

Pregnant women who have syphilis should be treated with penicillin immediately: Treatment ≥ 30 days prior to delivery is likely to prevent most cases of congenital syphilis.

Creatinine clearance should be assessed at baseline and yearly (every 6 months for those older than 50 years) in patients taking PrEP. All patients must be tested for HIV at initiation of treatment and every 3 months thereafter (every 4 months for cabotegravir plus rilpirivine). Patients should be screened for bacterial STIs every 6 months (every 3 months for MSM and transgender women); screening for chlamydia should be done yearly. For patients being treated with emtricitabine plus tenofovir alafenamide, weight and a lipid profile (cholesterol and triglycerides) should be assessed annually.⁵⁵

Postexposure prophylaxis

The sharp rise in the incidence of STIs in the past few years has brought renewed interest in postexposure prophylaxis (PEP) for STIs. Although PEP should be standard in cases of sexual assault, this protocol also can be considered in other instances of high-risk exposure.

CDC recommendations for PEP in cases of assault are⁵⁶:

• ceftriaxone 500 mg IM in a single dose (1 g if weight is ≥ 150 kg) plus
• doxycycline 100 mg bid for 7 days plus
• metronidazole 2 g bid for 7 days (for vaginal exposure)
• pregnancy evaluation and emergency contraception
• hepatitis B risk evaluation and vaccination, with or without hepatitis B immune globulin
• HIV risk evaluation, based on CDC guidelines, and possible HIV prophylaxis (PrEP)
• HPV vaccination for patients ages 9 to 26 years if they are not already fully vaccinated.

CORRESPONDENCE
Belinda Vail, MD, 3901 Rainbow Boulevard, Mail Stop 4010, Kansas City, KS 66160; [email protected]

Except for a drop in the number of sexually transmitted infections (STIs) early in the COVID-19 pandemic (March and April 2020), the incidence of STIs has been rising throughout this century.¹ In 2018, 1 in 5 people in the United States had an STI; 26 million new cases were reported that year, resulting in direct costs of $16 billion—85% of which was for the care of HIV infection.² Also that year, infection with Chlamydia trachomatis (chlamydia), Trichomonas vaginalis (trichomoniasis), herpesvirus type 2 (genital herpes), and/or human papillomavirus (condylomata acuminata) constituted 97.6% of all prevalent and 93.1% of all incident STIs.³ Almost half (45.5%) of new cases of STIs occur in people between the ages of 15 and 24 years.³

Three factors—changing social patterns, including the increase of social networking; the ability of antiviral therapy to decrease the spread of HIV, leading to a reduction in condom use; and increasing antibiotic resistance—have converged to force changes in screening and treatment recommendations. In this article, we summarize updated guidance for primary care clinicians from several sources—including the Centers for Disease Control and Prevention (CDC), the US Preventive Services Task Force (USPSTF), and the American Society for Colposcopy and Cervical Pathology (ASCCP)—on diagnosing STIs (TABLE 1^4-13) and providing guideline-based treatment ­(Table 2¹⁴). Because of the breadth and complexity of HIV disease, it is not addressed here.

Chlamydia

Infection with Chlamydia trachomatis—the most commonly reported bacterial STI in the United States—primarily causes cervicitis in women and proctitis in men, and can cause urethritis and pharyngitis in men and women. Prevalence is highest in sexually active people younger than 24 years.¹⁵

Because most infected people are asymptomatic and show no signs of illness on physical exam, screening is recommended for all sexually active women younger than 25 years and all men who have sex with men (MSM).⁴ No studies have established proper screening intervals; a reasonable approach, therefore, is to repeat screening for patients who have a sexual history that confers a new or persistent risk for infection since their last negative result.

Depending on the location of the infection, symptoms of chlamydia can include vaginal or penile irritation or discharge, dysuria, pelvic or rectal pain, and sore throat. Breakthrough bleeding in a patient who is taking an oral contraceptive should raise suspicion for chlamydia.

Untreated chlamydia can lead to pelvic inflammatory disease (PID), tubo-ovarian abscess, tubal factor infertility, ectopic pregnancy, and chronic pelvic pain. Infection can be transmitted vertically (mother to baby) antenatally, which can cause ophthalmia neonatorum and pneumonia in these newborns.

Diagnosis. The diagnosis of chlamydia is made using nucleic acid amplification testing (NAAT). Specimens can be collected by the clinician or the patient (self collected) using a vaginal, rectal, or oropharyngeal swab, or a combination of these, and can be obtained from urine or liquid-based cytology material.¹⁶

Continue to: Treatment

Treatment. Recommendations for treating chlamydia were updated by the CDC in its 2021 treatment guidelines (Table 2¹⁴). Doxycycline 100 mg bid for 7 days is the preferred regimen; alternative regiments are (1) azithromycin 1 g in a single dose and (2) levofloxacin 500 mg daily for 7 days.⁴ A meta-analysis¹⁷ and a Cochrane review¹⁸ showed that the rate of treatment failure was higher among men when they were treated with azithromycin instead of doxycycline; furthermore, a randomized controlled trial demonstrated that doxycycline is more effective than azithromycin (cure rate, 100%, compared to 74%) at treating rectal chlamydia in MSM.¹⁹

Azithromycin is efficacious for urogenital infection in women; however, there is concern that the 33% to 83% of women who have concomitant rectal infection (despite reporting no receptive anorectal sexual activity) would be insufficiently treated. Outside pregnancy, the CDC does not recommend a test of cure but does recommend follow-up testing for reinfection in 3 months. Patients should abstain from sexual activity until 7 days after all sexual partners have been treated.

Expedited partner therapy (EPT) is the practice of treating sexual partners of patients with known chlamydia (and patients with gonococcal infection). Unless prohibited by law in your state, offer EPT to patients with chlamydia if they cannot ensure that their sexual partners from the past 60 days will seek timely treatment.^a

Breakthrough bleeding in a patient who is taking an oral contraceptive should raise suspicion for chlamydia.

Evidence to support EPT comes from 3 US clinical trials, whose subjects comprised heterosexual men and women with chlamydia or gonorrhea.^21-23 The role of EPT for MSM is unclear; data are limited. Shared ­decision-making is recommended to determine whether EPT should be provided, to ensure that co-infection with other bacterial STIs (eg, syphilis) or HIV is not missed.^24-26

^a Visit www.cdc.gov/std/ept to read updated information about laws and regulations regarding EPT in your state.²⁰

Gonorrhea

Gonorrhea is the second most-reported bacterial communicable disease.⁵ Infection with Neisseria gonorrhoeae causes urethral discharge in men, leading them to seek treatment; infected women, however, are often asymptomatic. Infected men and women might not recognize symptoms until they have transmitted the disease. Women have a slower natural clearance of gonococcal infection, which might explain their higher prevalence.²⁷ Delayed recognition of symptoms can result in complications, including PID.⁵

Diagnosis. Specimens for NAAT can be obtained from urine, endocervical, vaginal, rectal, pharyngeal, and male urethral specimens. Reported sexual behaviors and exposures of women and transgender or gender-diverse people should be taken into consideration to determine whether rectal or pharyngeal testing, or both, should be performed.²⁸ MSM should be screened annually at sites of contact, including the urethra, rectum, and pharynx.²⁸ All patients with urogenital or rectal gonorrhea should be asked about oral sexual exposure; if reported, pharyngeal testing should be performed.⁵

NAAT of urine is at least as sensitive as testing of an endocervical specimen; the same specimen can be used to test for chlamydia and gonorrhea. Patient-collected specimens are a reasonable alternative to clinician-collected swab specimens.²⁹

Continue to: Treatment

Treatment is complicated by the ability of gonorrhea to develop resistance. Intramuscular ceftriaxone 500 mg in a single dose cures 98% to 99% of infections in the United States; however, monitoring local resistance patterns in the community is an important component of treatment.²⁸ (See Table 2¹⁴ for an alternative regimen for cephalosporin-allergic patients and for treating gonococcal conjunctivitis and disseminated infection.)

Unless prohibited by law in your state, offer expedited partner therapy to patients with chlamydia if they cannot ensure that their sexual partners from the past 60 days will seek timely treatment.

In 2007, the CDC identified widespread quinolone-resistant gonococcal strains; therefore, fluoroquinolones no longer are recommended for treating gonorrhea.³⁰ Cefixime has demonstrated only limited success in treating pharyngeal gonorrhea and does not attain a bactericidal level as high as ceftriaxone does; cefixime therefore is recommended only if ceftriaxone is unavailable.²⁸ The national Gonococcal Isolate Surveillance Project is finding emerging evidence of the reduced susceptibility of N gonorrhoeae to azithromycin—making dual therapy for gonococcal infection no longer a recommendation.²⁸

Patients should abstain from sex until 7 days after all sex partners have been treated for gonorrhea. As with chlamydia, the CDC does not recommend a test of cure for uncomplicated urogenital or rectal gonorrhea unless the patient is pregnant, but does recommend testing for reinfection 3 months after treatment.¹⁴ For patients with pharyngeal gonorrhea, a test of cure is recommended 7 to 14 days after initial treatment, due to challenges in treatment and because this site of infection is a potential source of antibiotic resistance.²⁸

Trichomoniasis

T vaginalis, the most common nonviral STI worldwide,³¹ can manifest as a yellow-green vaginal discharge with or without vaginal discomfort, dysuria, epididymitis, and prostatitis; most cases, however, are asymptomatic. On examination, the cervix might be erythematous with punctate lesions (known as strawberry cervix).

Unlike most STIs, trichomoniasis is as common in women older than 24 years as it is in younger women. Infection is associated with a lower educational level, lower socioeconomic status, and having ≥ 2 sexual partners in the past year.³² Prevalence is approximately 10 times as high in Black women as it is in White women.

T vaginalis infection is associated with an increase in the risk for preterm birth, premature rupture of membranes, cervical cancer, and HIV infection. With a lack of high-quality clinical trials on the efficacy of screening, women with HIV are the only group for whom routine screening is recommended.⁶

Diagnosis. NAAT for trichomoniasis is now available in conjunction with gonorrhea and chlamydia testing of specimens on vaginal or urethral swabs and of urine specimens and liquid Pap smears.

Continue to: Treatment

Treatment. Because of greater efficacy, the treatment recommendation for women has changed from a single 2-g dose of oral metronidazole to 500 mg twice daily for 7 days. The 2-g single oral dose is still recommended for men⁷ (Table 2¹⁴ lists alternative regimens).

Mycoplasma genitalium

Infection with M genitalium is common and often asymptomatic. The disease causes approximately 20% of all cases of nongonococcal and nonchlamydial urethritis in men and about 40% of persistent or recurrent infections. M genitalium is present in approximately 20% of women with cervicitis and has been associated with PID, preterm delivery, spontaneous abortion, and infertility.

There are limited and conflicting data regarding outcomes in infected patients other than those with persistent or recurrent infection; furthermore, resistance to azithromycin is increasing rapidly, resulting in an increase in treatment failures. Screening therefore is not recommended, and testing is recommended only in men with nongonococcal urethritis.^33,34

Diagnosis. NAAT can be performed on urine or on a urethral, penile meatal, endocervical, or vaginal swab; men with recurrent urethritis or women with recurrent cervicitis should be tested. NAAT also can be considered in women with PID. Testing the specimen for the microorganism’s resistance to macrolide antibiotics is recommended (if such testing is available).

Treatment is initiated with doxycycline 100 mg twice daily for 7 days. If the organism is macrolide sensitive, follow with azithromycin 1 g orally on Day 1, then 500 mg/d for 3 more days. If the organism is macrolide resistant or testing is unavailable, follow doxycycline with oral moxifloxacin 400 mg/d for 7 days.³³

Genital herpes (mostly herpesvirus type 2)

Genital herpes, characterized by painful, recurrent outbreaks of genital and anal lesions,³⁵ is a lifelong infection that increases in prevalence with age.⁸ Because many infected people have disease that is undiagnosed or mild or have unrecognizable symptoms during viral shedding, most genital herpes infections are transmitted by people who are unaware that they are contagious.³⁶ Herpesvirus type 2 (HSV-2) causes most cases of genital herpes, although an increasing percentage of cases are attributed to HSV type 1 (HSV-1) through receptive oral sex from a person who has an oral HSV-1 lesion.

Intramuscular ceftriaxone 500 mg in a single dose cures 98% to 99% of gonococcal infections in the United States; monitoring local resistance patterns in the community is important.

Importantly, HSV-2–infected people are 2 to 3 times more likely to become infected with HIV than people who are not HSV-2 infected.³⁷ This is becauseCD4+ T cells concentrate at the site of HSV lesions and express a higher level of cell-surface receptors that HIV uses to enter cells. HIV replicates 3 to 5 times more quickly in HSV-infected tissue.³⁸

Continue to: HSV can become disseminated...

HSV can become disseminated, particularly in immunosuppressed people, and can manifest as encephalitis, hepatitis, and pneumonitis. Beyond its significant burden on health, HSV carries significant psychosocial consequences.⁹

Diagnosis. Clinical diagnosis can be challenging if classic lesions are absent at evaluation. If genital lesions are present, HSV can be identified by NAAT or culture of a specimen of those lesions. False-negative antibody results might be more frequent in early stages of infection; repeating antibody testing 12 weeks after presumed time of acquisition might therefore be indicated, based on clinical judgment. HSV-2 antibody positivity implies anogenital infection because almost all HSV-2 infections are sexually acquired.

HSV-1 antibody positivity alone is more difficult to interpret because this finding does not distinguish between oral and genital lesions, and most HSV-1 seropositivity is acquired during childhood.³⁶ HSV polymerase chain reaction (PCR) testing of blood should not be performed to diagnose genital herpes infection, except in settings in which there is concern about disseminated infection.

Treatment. Management should address the acute episode and the chronic nature of genital herpes. Antivirals will not eradicate latent virus; rather, the goals of treatment are to:

• attenuate current infection
• prevent recurrence
• improve quality of life
• suppress the virus to prevent transmission to sexual partners.

All patients experiencing an initial episode of genital herpes should be treated, regardless of symptoms, due to the potential for prolonged or severe symptoms during recurrent episodes.⁹ Three drugs—acyclovir, valacyclovir, and famciclovir—are approved by the US Food and Drug Administration (FDA) to treat genital herpes and appear equally effective (TABLE 2¹⁴).

Antiviral therapy for recurrent genital HSV infection can be administered either as suppressive therapy to reduce the frequency of recurrences or episodically to shorten the duration of lesions:

• Suppressive therapy reduces the frequency of recurrence by 70% to 80% among patients with frequent outbreaks. Long-term safety and efficacy are well established.
• Episodic therapy is most effective if started within 1 day after onset of lesions or during the prodrome.³⁶

There is no specific recommendation for when to choose suppressive over episodic therapy; most patients prefer suppressive therapy because it improves quality of life. Use shared clinical decision-making to determine the best option for an individual patient.

Continue to: Human papillomavirus

Condylomata acuminata (genital warts) are caused by human papillomavirus (HPV), most commonly types 6 and 11, which manifest as soft papules or plaques on the external genitalia, perineum, perianal skin, and groin. The warts are usually asymptomatic but can be painful or pruritic, depending on size and location.

Diagnosis is made by visual inspection and can be confirmed by biopsy if lesions are atypical. Lesions can resolve spontaneously, remain unchanged, or grow in size or number.

Treatment. The aim of treatment is relief of symptoms and removal of warts. Treatment does not eradicate HPV infection. Multiple treatments are available that can be applied by the patient as a cream, gel, or ointment or administered by the provider, including cryotherapy, surgical removal, and solutions. The decision on how to treat should be based on the number, size, and location of lesions; patient preference; cost; convenience; and the modality’s adverse effects (TABLE 2¹⁴).

HPV-associated cancers and precancers. This is a broad (and separate) topic. HPV types 16 and 18 cause most cases of cervical, penile, vulvar, vaginal, anal, and oropharyngeal cancer and precancer.³⁹ The USPSTF, the American Cancer Society, and the American College of Obstetricians and Gynecologists all have recommendations for cervical cancer screening in the United States.⁴⁰ Refer to guidelines of the ASCCP for recommendations on abnormal screening tests.⁴¹

Prevention of genital warts. The 9-­valent HPV vaccine available in the United States is safe and effective and helps protect against viral types 6, 11, 16, 18, 31, 33, 45, 52, and 58. Types 6 and 11 are the principal causes of genital warts. Types 16 and 18 cause 66% of cervical cancer. The vaccination series can be started at age 9 years and is recommended for everyone through age 26 years. Only 2 doses are needed if the first dose is given prior to age 15 years; given after that age, a 3-dose series is utilized. Refer to CDC vaccine guidelines⁴² for details on the exact timing of vaccination.

Trichomoniasis can manifest as a yellowgreen vaginal discharge with or without vaginal discomfort, dysuria, epididymitis, and prostatitis; most cases, however, are asymptomatic.

Vaccination for women ages 27 to 45 years is not universally recommended because most people have been exposed to HPV by that age. However, the vaccine can still be administered, depending on clinical circumstances and the risk for new infection.⁴²

Syphilis

Caused by the spirochete Treponema pallidum, syphilis manifests across a spectrum—from congenital to tertiary. The inability of medical science to develop a method for culturing the spirochete has confounded diagnosis and treatment.

Continue to: Since reaching a historic...

Since reaching a historic nadir of incidence in 2000 (5979 cases in the United States), there has been an increasingly rapid rise in that number: to 130,000 in 2020. More than 50% of cases are in MSM; however, the number of cases in heterosexual women is rapidly increasing.⁴³

Routine screening for syphilis should be performed in any person who is at risk: all pregnant women in the first trimester (and in the third trimester and at delivery if they are at risk or live in a community where prevalence is high) and annually in sexually active MSM or anyone with HIV infection.¹⁰

Diagnosis. Examination by dark-field microscopy, testing by PCR, and direct fluorescent antibody assay for T pallidum from lesion tissue or exudate provide definitive diagnosis for early and congenital syphilis, but are often unavailable.

Presumptive diagnosis requires 2 serologic tests:

• Nontreponemal tests (the VDRL and rapid plasma reagin tests) identify anticardiolipin antibodies released during syphilis infection, although results also can be elevated in autoimmune disease or after certain immunizations, including the COVID-19 vaccine.
• Treponemal tests (the fluorescent treponemal antibody absorbed assay, T pallidum particulate agglutination assay, enzyme immunoassay, and chemiluminescence immunoassay) are specific antibody tests.

Historically, reactive nontreponemal tests, which are less expensive and easier to perform, were followed by a treponemal test to confirm the presumptive diagnosis. This method continues to be reasonable when screening patients in a low-prevalence population.¹¹ The reverse sequence screening algorithm (ie, begin with a treponemal test) is now frequently used. With this method, a positive treponemal test must be confirmed with a nontreponemal test. If the treponemal test is positive and the nontreponemal test is negative, another treponemal test must be positive to confirm the diagnosis. This algorithm is useful in high-risk populations because it provides earlier detection of recently acquired syphilis and enhanced detection of late latent syphilis.^12,13,44 The CDC has not stated a diagnostic preference.

Once the diagnosis is made, a complete history (including a sexual history and a history of syphilis testing and treatment) and a physical exam are necessary to confirm stage of disease.⁴⁵

Special circumstances. Neurosyphilis, ocular syphilis, and otosyphilis refer to the site of infection and can occur at any stage of disease. The nervous system usually is infected within hours of initial infection, but symptoms might take weeks or years to ­develop—or might never manifest. Any time a patient develops neurologic, ophthalmologic, or audiologic symptoms, careful neurologic and ophthalmologic evaluation should be performed and the patient should be tested for HIV.

Continue to: Lumbar puncture is warranted...

Lumbar puncture is warranted for evaluation of cerebrospinal fluid if neurologic symptoms are present but is not necessary for isolated ocular syphilis or otosyphilis without neurologic findings. Treatment should not be delayed for test results if ocular syphilis is suspected because permanent blindness can develop. Any patient at high risk for an STI who presents with neurologic or ophthalmologic symptoms should be tested for syphilis and HIV.⁴⁵

Pregnant women who have a diagnosis of syphilis should be treated with penicillin immediately because treatment ≥ 30 days prior to delivery is likely to prevent most ­cases of congenital syphilis. However, a course of penicillin might not prevent stillbirth or congenital syphilis in a gravely infected fetus, evidenced by fetal syphilis on a sonogram at the time of treatment. Additional doses of penicillin in pregnant women with early syphilis might be indicated if there is evidence of ­fetal syphilis on ultrasonography. All women who deliver a stillborn infant (≥ 20 weeks’ ­gestation) should be tested for syphilis at ­delivery.⁴⁶

All patients in whom primary or secondary syphilis has been diagnosed should be tested for HIV at the time of diagnosis and treatment; if the result is negative, they should be offered preexposure prophylaxis (PrEP; discussed shortly). If the incidence of HIV in your community is high, repeat testing for HIV in 3 months. Clinical and serologic evaluation should be performed 6 and 12 months after treatment.⁴⁷

Treatment. Penicillin remains the standard treatment for syphilis. Primary, secondary, and early tertiary stages (including in pregnancy) are treated with benzathine penicillin G 2.4 million units intramuscular (IM) in a single dose. For pregnant patients, repeating that dose in 1 week generally is recommended. Patients in the late latent (> 1 year) or tertiary stage receive the same dose of penicillin, which is then repeated weekly, for a total of 3 doses. Doxycycline and ceftriaxone are alternatives, except in ­pregnancy.

Antivirals will not eradicate latent herpesvirus; rather, the goals of treatment are to attenuate current infection, prevent recurrence, and improve quality of life.

Warn patients of the Jarisch-Herxheimer reaction: fever, headache, and myalgias associated with initiation of treatment in the presence of the high bacterial load seen in early syphilis. Treatment is symptomatic, but the Jarisch-Herxheimer reaction can cause fetal distress in pregnancy.

Otosyphilis, ocular syphilis, and neurosyphilis require intravenous (IV) aqueous crystalline penicillin G 3 to 4 million U every 4 hours for 10 to 14 days.⁴⁵ Alternatively, procaine penicillin G 2.4 million U/d IM can be given daily with oral probenecid 500 mg qid, both for 10 to 14 days (TABLE 2¹⁴).

Screening andprevention of STIs

Screening recommendations

Follow USPSTF screening guidelines for STIs.^10,48-54 Screen annually for:

• gonorrhea and chlamydia in women ages 15 to 24 years and in women older than 25 years if they are at increased risk
• gonorrhea, chlamydia, syphilis, and HIV in MSM, and hepatitis C if they are HIV positive
• trichomoniasis in women who are HIV positive.

Continue to: Consider the community in which...

Vaccination against human papillomavirus is not universally recommended for women ages 27 to 45 years because most people have been exposed to HPV by that age.

Consider the community in which you practice when determining risk; you might want to consult local public health authorities for information about local epidemiology and guidance on determining which of your patients are at increased risk.

Preexposure prophylaxis

According to the CDC, all sexually active adults and adolescents should be informed about the availability of PrEP to prevent HIV infection. PrEP should be (1) available to anyone who requests it and (2) recommended for anyone who is sexually active and who practices sexual behaviors that place them at substantial risk for exposure to or acquisition of HIV, or both.

The recommended treatment protocol for men and women who have either an HIV-positive partner or inconsistent condom use or who have had a bacterial STI in the previous 6 months is oral emtricitabine 200 mg plus tenofovir disoproxil fumarate 300 mg/d (sold as Truvada-F/TDF). Men and transgender women (ie, assigned male at birth) with at-risk behaviors also can use emtricitabine plus tenofovir alafenamide 25 mg/d (sold as Descovy-F/TAF).

In addition, cabotegravir plus rilpirivine (sold as Cabenuva), IM every 2 months, was approved by the FDA for PrEP in 2021.

Pregnant women who have syphilis should be treated with penicillin immediately: Treatment ≥ 30 days prior to delivery is likely to prevent most cases of congenital syphilis.

Creatinine clearance should be assessed at baseline and yearly (every 6 months for those older than 50 years) in patients taking PrEP. All patients must be tested for HIV at initiation of treatment and every 3 months thereafter (every 4 months for cabotegravir plus rilpirivine). Patients should be screened for bacterial STIs every 6 months (every 3 months for MSM and transgender women); screening for chlamydia should be done yearly. For patients being treated with emtricitabine plus tenofovir alafenamide, weight and a lipid profile (cholesterol and triglycerides) should be assessed annually.⁵⁵

Postexposure prophylaxis

The sharp rise in the incidence of STIs in the past few years has brought renewed interest in postexposure prophylaxis (PEP) for STIs. Although PEP should be standard in cases of sexual assault, this protocol also can be considered in other instances of high-risk exposure.

CDC recommendations for PEP in cases of assault are⁵⁶:

• ceftriaxone 500 mg IM in a single dose (1 g if weight is ≥ 150 kg) plus
• doxycycline 100 mg bid for 7 days plus
• metronidazole 2 g bid for 7 days (for vaginal exposure)
• pregnancy evaluation and emergency contraception
• hepatitis B risk evaluation and vaccination, with or without hepatitis B immune globulin
• HIV risk evaluation, based on CDC guidelines, and possible HIV prophylaxis (PrEP)
• HPV vaccination for patients ages 9 to 26 years if they are not already fully vaccinated.

CORRESPONDENCE
Belinda Vail, MD, 3901 Rainbow Boulevard, Mail Stop 4010, Kansas City, KS 66160; [email protected]

Except for a drop in the number of sexually transmitted infections (STIs) early in the COVID-19 pandemic (March and April 2020), the incidence of STIs has been rising throughout this century.¹ In 2018, 1 in 5 people in the United States had an STI; 26 million new cases were reported that year, resulting in direct costs of $16 billion—85% of which was for the care of HIV infection.² Also that year, infection with Chlamydia trachomatis (chlamydia), Trichomonas vaginalis (trichomoniasis), herpesvirus type 2 (genital herpes), and/or human papillomavirus (condylomata acuminata) constituted 97.6% of all prevalent and 93.1% of all incident STIs.³ Almost half (45.5%) of new cases of STIs occur in people between the ages of 15 and 24 years.³

Three factors—changing social patterns, including the increase of social networking; the ability of antiviral therapy to decrease the spread of HIV, leading to a reduction in condom use; and increasing antibiotic resistance—have converged to force changes in screening and treatment recommendations. In this article, we summarize updated guidance for primary care clinicians from several sources—including the Centers for Disease Control and Prevention (CDC), the US Preventive Services Task Force (USPSTF), and the American Society for Colposcopy and Cervical Pathology (ASCCP)—on diagnosing STIs (TABLE 1^4-13) and providing guideline-based treatment ­(Table 2¹⁴). Because of the breadth and complexity of HIV disease, it is not addressed here.

Chlamydia

Infection with Chlamydia trachomatis—the most commonly reported bacterial STI in the United States—primarily causes cervicitis in women and proctitis in men, and can cause urethritis and pharyngitis in men and women. Prevalence is highest in sexually active people younger than 24 years.¹⁵

Because most infected people are asymptomatic and show no signs of illness on physical exam, screening is recommended for all sexually active women younger than 25 years and all men who have sex with men (MSM).⁴ No studies have established proper screening intervals; a reasonable approach, therefore, is to repeat screening for patients who have a sexual history that confers a new or persistent risk for infection since their last negative result.

Depending on the location of the infection, symptoms of chlamydia can include vaginal or penile irritation or discharge, dysuria, pelvic or rectal pain, and sore throat. Breakthrough bleeding in a patient who is taking an oral contraceptive should raise suspicion for chlamydia.

Untreated chlamydia can lead to pelvic inflammatory disease (PID), tubo-ovarian abscess, tubal factor infertility, ectopic pregnancy, and chronic pelvic pain. Infection can be transmitted vertically (mother to baby) antenatally, which can cause ophthalmia neonatorum and pneumonia in these newborns.

Diagnosis. The diagnosis of chlamydia is made using nucleic acid amplification testing (NAAT). Specimens can be collected by the clinician or the patient (self collected) using a vaginal, rectal, or oropharyngeal swab, or a combination of these, and can be obtained from urine or liquid-based cytology material.¹⁶

Continue to: Treatment

Treatment. Recommendations for treating chlamydia were updated by the CDC in its 2021 treatment guidelines (Table 2¹⁴). Doxycycline 100 mg bid for 7 days is the preferred regimen; alternative regiments are (1) azithromycin 1 g in a single dose and (2) levofloxacin 500 mg daily for 7 days.⁴ A meta-analysis¹⁷ and a Cochrane review¹⁸ showed that the rate of treatment failure was higher among men when they were treated with azithromycin instead of doxycycline; furthermore, a randomized controlled trial demonstrated that doxycycline is more effective than azithromycin (cure rate, 100%, compared to 74%) at treating rectal chlamydia in MSM.¹⁹

Azithromycin is efficacious for urogenital infection in women; however, there is concern that the 33% to 83% of women who have concomitant rectal infection (despite reporting no receptive anorectal sexual activity) would be insufficiently treated. Outside pregnancy, the CDC does not recommend a test of cure but does recommend follow-up testing for reinfection in 3 months. Patients should abstain from sexual activity until 7 days after all sexual partners have been treated.

Expedited partner therapy (EPT) is the practice of treating sexual partners of patients with known chlamydia (and patients with gonococcal infection). Unless prohibited by law in your state, offer EPT to patients with chlamydia if they cannot ensure that their sexual partners from the past 60 days will seek timely treatment.^a

Breakthrough bleeding in a patient who is taking an oral contraceptive should raise suspicion for chlamydia.

Evidence to support EPT comes from 3 US clinical trials, whose subjects comprised heterosexual men and women with chlamydia or gonorrhea.^21-23 The role of EPT for MSM is unclear; data are limited. Shared ­decision-making is recommended to determine whether EPT should be provided, to ensure that co-infection with other bacterial STIs (eg, syphilis) or HIV is not missed.^24-26

^a Visit www.cdc.gov/std/ept to read updated information about laws and regulations regarding EPT in your state.²⁰

Gonorrhea

Gonorrhea is the second most-reported bacterial communicable disease.⁵ Infection with Neisseria gonorrhoeae causes urethral discharge in men, leading them to seek treatment; infected women, however, are often asymptomatic. Infected men and women might not recognize symptoms until they have transmitted the disease. Women have a slower natural clearance of gonococcal infection, which might explain their higher prevalence.²⁷ Delayed recognition of symptoms can result in complications, including PID.⁵

Diagnosis. Specimens for NAAT can be obtained from urine, endocervical, vaginal, rectal, pharyngeal, and male urethral specimens. Reported sexual behaviors and exposures of women and transgender or gender-diverse people should be taken into consideration to determine whether rectal or pharyngeal testing, or both, should be performed.²⁸ MSM should be screened annually at sites of contact, including the urethra, rectum, and pharynx.²⁸ All patients with urogenital or rectal gonorrhea should be asked about oral sexual exposure; if reported, pharyngeal testing should be performed.⁵

NAAT of urine is at least as sensitive as testing of an endocervical specimen; the same specimen can be used to test for chlamydia and gonorrhea. Patient-collected specimens are a reasonable alternative to clinician-collected swab specimens.²⁹

Continue to: Treatment

Treatment is complicated by the ability of gonorrhea to develop resistance. Intramuscular ceftriaxone 500 mg in a single dose cures 98% to 99% of infections in the United States; however, monitoring local resistance patterns in the community is an important component of treatment.²⁸ (See Table 2¹⁴ for an alternative regimen for cephalosporin-allergic patients and for treating gonococcal conjunctivitis and disseminated infection.)

Unless prohibited by law in your state, offer expedited partner therapy to patients with chlamydia if they cannot ensure that their sexual partners from the past 60 days will seek timely treatment.

In 2007, the CDC identified widespread quinolone-resistant gonococcal strains; therefore, fluoroquinolones no longer are recommended for treating gonorrhea.³⁰ Cefixime has demonstrated only limited success in treating pharyngeal gonorrhea and does not attain a bactericidal level as high as ceftriaxone does; cefixime therefore is recommended only if ceftriaxone is unavailable.²⁸ The national Gonococcal Isolate Surveillance Project is finding emerging evidence of the reduced susceptibility of N gonorrhoeae to azithromycin—making dual therapy for gonococcal infection no longer a recommendation.²⁸

Patients should abstain from sex until 7 days after all sex partners have been treated for gonorrhea. As with chlamydia, the CDC does not recommend a test of cure for uncomplicated urogenital or rectal gonorrhea unless the patient is pregnant, but does recommend testing for reinfection 3 months after treatment.¹⁴ For patients with pharyngeal gonorrhea, a test of cure is recommended 7 to 14 days after initial treatment, due to challenges in treatment and because this site of infection is a potential source of antibiotic resistance.²⁸

Trichomoniasis

T vaginalis, the most common nonviral STI worldwide,³¹ can manifest as a yellow-green vaginal discharge with or without vaginal discomfort, dysuria, epididymitis, and prostatitis; most cases, however, are asymptomatic. On examination, the cervix might be erythematous with punctate lesions (known as strawberry cervix).

Unlike most STIs, trichomoniasis is as common in women older than 24 years as it is in younger women. Infection is associated with a lower educational level, lower socioeconomic status, and having ≥ 2 sexual partners in the past year.³² Prevalence is approximately 10 times as high in Black women as it is in White women.

T vaginalis infection is associated with an increase in the risk for preterm birth, premature rupture of membranes, cervical cancer, and HIV infection. With a lack of high-quality clinical trials on the efficacy of screening, women with HIV are the only group for whom routine screening is recommended.⁶

Diagnosis. NAAT for trichomoniasis is now available in conjunction with gonorrhea and chlamydia testing of specimens on vaginal or urethral swabs and of urine specimens and liquid Pap smears.

Continue to: Treatment

Treatment. Because of greater efficacy, the treatment recommendation for women has changed from a single 2-g dose of oral metronidazole to 500 mg twice daily for 7 days. The 2-g single oral dose is still recommended for men⁷ (Table 2¹⁴ lists alternative regimens).

Mycoplasma genitalium

Infection with M genitalium is common and often asymptomatic. The disease causes approximately 20% of all cases of nongonococcal and nonchlamydial urethritis in men and about 40% of persistent or recurrent infections. M genitalium is present in approximately 20% of women with cervicitis and has been associated with PID, preterm delivery, spontaneous abortion, and infertility.

There are limited and conflicting data regarding outcomes in infected patients other than those with persistent or recurrent infection; furthermore, resistance to azithromycin is increasing rapidly, resulting in an increase in treatment failures. Screening therefore is not recommended, and testing is recommended only in men with nongonococcal urethritis.^33,34

Diagnosis. NAAT can be performed on urine or on a urethral, penile meatal, endocervical, or vaginal swab; men with recurrent urethritis or women with recurrent cervicitis should be tested. NAAT also can be considered in women with PID. Testing the specimen for the microorganism’s resistance to macrolide antibiotics is recommended (if such testing is available).

Treatment is initiated with doxycycline 100 mg twice daily for 7 days. If the organism is macrolide sensitive, follow with azithromycin 1 g orally on Day 1, then 500 mg/d for 3 more days. If the organism is macrolide resistant or testing is unavailable, follow doxycycline with oral moxifloxacin 400 mg/d for 7 days.³³

Genital herpes (mostly herpesvirus type 2)

Genital herpes, characterized by painful, recurrent outbreaks of genital and anal lesions,³⁵ is a lifelong infection that increases in prevalence with age.⁸ Because many infected people have disease that is undiagnosed or mild or have unrecognizable symptoms during viral shedding, most genital herpes infections are transmitted by people who are unaware that they are contagious.³⁶ Herpesvirus type 2 (HSV-2) causes most cases of genital herpes, although an increasing percentage of cases are attributed to HSV type 1 (HSV-1) through receptive oral sex from a person who has an oral HSV-1 lesion.

Intramuscular ceftriaxone 500 mg in a single dose cures 98% to 99% of gonococcal infections in the United States; monitoring local resistance patterns in the community is important.

Importantly, HSV-2–infected people are 2 to 3 times more likely to become infected with HIV than people who are not HSV-2 infected.³⁷ This is becauseCD4+ T cells concentrate at the site of HSV lesions and express a higher level of cell-surface receptors that HIV uses to enter cells. HIV replicates 3 to 5 times more quickly in HSV-infected tissue.³⁸

Continue to: HSV can become disseminated...

HSV can become disseminated, particularly in immunosuppressed people, and can manifest as encephalitis, hepatitis, and pneumonitis. Beyond its significant burden on health, HSV carries significant psychosocial consequences.⁹

Diagnosis. Clinical diagnosis can be challenging if classic lesions are absent at evaluation. If genital lesions are present, HSV can be identified by NAAT or culture of a specimen of those lesions. False-negative antibody results might be more frequent in early stages of infection; repeating antibody testing 12 weeks after presumed time of acquisition might therefore be indicated, based on clinical judgment. HSV-2 antibody positivity implies anogenital infection because almost all HSV-2 infections are sexually acquired.

HSV-1 antibody positivity alone is more difficult to interpret because this finding does not distinguish between oral and genital lesions, and most HSV-1 seropositivity is acquired during childhood.³⁶ HSV polymerase chain reaction (PCR) testing of blood should not be performed to diagnose genital herpes infection, except in settings in which there is concern about disseminated infection.

Treatment. Management should address the acute episode and the chronic nature of genital herpes. Antivirals will not eradicate latent virus; rather, the goals of treatment are to:

• attenuate current infection
• prevent recurrence
• improve quality of life
• suppress the virus to prevent transmission to sexual partners.

All patients experiencing an initial episode of genital herpes should be treated, regardless of symptoms, due to the potential for prolonged or severe symptoms during recurrent episodes.⁹ Three drugs—acyclovir, valacyclovir, and famciclovir—are approved by the US Food and Drug Administration (FDA) to treat genital herpes and appear equally effective (TABLE 2¹⁴).

Antiviral therapy for recurrent genital HSV infection can be administered either as suppressive therapy to reduce the frequency of recurrences or episodically to shorten the duration of lesions:

• Suppressive therapy reduces the frequency of recurrence by 70% to 80% among patients with frequent outbreaks. Long-term safety and efficacy are well established.
• Episodic therapy is most effective if started within 1 day after onset of lesions or during the prodrome.³⁶

There is no specific recommendation for when to choose suppressive over episodic therapy; most patients prefer suppressive therapy because it improves quality of life. Use shared clinical decision-making to determine the best option for an individual patient.

Continue to: Human papillomavirus

Condylomata acuminata (genital warts) are caused by human papillomavirus (HPV), most commonly types 6 and 11, which manifest as soft papules or plaques on the external genitalia, perineum, perianal skin, and groin. The warts are usually asymptomatic but can be painful or pruritic, depending on size and location.

Diagnosis is made by visual inspection and can be confirmed by biopsy if lesions are atypical. Lesions can resolve spontaneously, remain unchanged, or grow in size or number.

Treatment. The aim of treatment is relief of symptoms and removal of warts. Treatment does not eradicate HPV infection. Multiple treatments are available that can be applied by the patient as a cream, gel, or ointment or administered by the provider, including cryotherapy, surgical removal, and solutions. The decision on how to treat should be based on the number, size, and location of lesions; patient preference; cost; convenience; and the modality’s adverse effects (TABLE 2¹⁴).

HPV-associated cancers and precancers. This is a broad (and separate) topic. HPV types 16 and 18 cause most cases of cervical, penile, vulvar, vaginal, anal, and oropharyngeal cancer and precancer.³⁹ The USPSTF, the American Cancer Society, and the American College of Obstetricians and Gynecologists all have recommendations for cervical cancer screening in the United States.⁴⁰ Refer to guidelines of the ASCCP for recommendations on abnormal screening tests.⁴¹

Prevention of genital warts. The 9-­valent HPV vaccine available in the United States is safe and effective and helps protect against viral types 6, 11, 16, 18, 31, 33, 45, 52, and 58. Types 6 and 11 are the principal causes of genital warts. Types 16 and 18 cause 66% of cervical cancer. The vaccination series can be started at age 9 years and is recommended for everyone through age 26 years. Only 2 doses are needed if the first dose is given prior to age 15 years; given after that age, a 3-dose series is utilized. Refer to CDC vaccine guidelines⁴² for details on the exact timing of vaccination.

Trichomoniasis can manifest as a yellowgreen vaginal discharge with or without vaginal discomfort, dysuria, epididymitis, and prostatitis; most cases, however, are asymptomatic.

Vaccination for women ages 27 to 45 years is not universally recommended because most people have been exposed to HPV by that age. However, the vaccine can still be administered, depending on clinical circumstances and the risk for new infection.⁴²

Syphilis

Caused by the spirochete Treponema pallidum, syphilis manifests across a spectrum—from congenital to tertiary. The inability of medical science to develop a method for culturing the spirochete has confounded diagnosis and treatment.

Continue to: Since reaching a historic...

Since reaching a historic nadir of incidence in 2000 (5979 cases in the United States), there has been an increasingly rapid rise in that number: to 130,000 in 2020. More than 50% of cases are in MSM; however, the number of cases in heterosexual women is rapidly increasing.⁴³

Routine screening for syphilis should be performed in any person who is at risk: all pregnant women in the first trimester (and in the third trimester and at delivery if they are at risk or live in a community where prevalence is high) and annually in sexually active MSM or anyone with HIV infection.¹⁰

Diagnosis. Examination by dark-field microscopy, testing by PCR, and direct fluorescent antibody assay for T pallidum from lesion tissue or exudate provide definitive diagnosis for early and congenital syphilis, but are often unavailable.

Presumptive diagnosis requires 2 serologic tests:

• Nontreponemal tests (the VDRL and rapid plasma reagin tests) identify anticardiolipin antibodies released during syphilis infection, although results also can be elevated in autoimmune disease or after certain immunizations, including the COVID-19 vaccine.
• Treponemal tests (the fluorescent treponemal antibody absorbed assay, T pallidum particulate agglutination assay, enzyme immunoassay, and chemiluminescence immunoassay) are specific antibody tests.

Historically, reactive nontreponemal tests, which are less expensive and easier to perform, were followed by a treponemal test to confirm the presumptive diagnosis. This method continues to be reasonable when screening patients in a low-prevalence population.¹¹ The reverse sequence screening algorithm (ie, begin with a treponemal test) is now frequently used. With this method, a positive treponemal test must be confirmed with a nontreponemal test. If the treponemal test is positive and the nontreponemal test is negative, another treponemal test must be positive to confirm the diagnosis. This algorithm is useful in high-risk populations because it provides earlier detection of recently acquired syphilis and enhanced detection of late latent syphilis.^12,13,44 The CDC has not stated a diagnostic preference.

Once the diagnosis is made, a complete history (including a sexual history and a history of syphilis testing and treatment) and a physical exam are necessary to confirm stage of disease.⁴⁵

Special circumstances. Neurosyphilis, ocular syphilis, and otosyphilis refer to the site of infection and can occur at any stage of disease. The nervous system usually is infected within hours of initial infection, but symptoms might take weeks or years to ­develop—or might never manifest. Any time a patient develops neurologic, ophthalmologic, or audiologic symptoms, careful neurologic and ophthalmologic evaluation should be performed and the patient should be tested for HIV.

Continue to: Lumbar puncture is warranted...

Lumbar puncture is warranted for evaluation of cerebrospinal fluid if neurologic symptoms are present but is not necessary for isolated ocular syphilis or otosyphilis without neurologic findings. Treatment should not be delayed for test results if ocular syphilis is suspected because permanent blindness can develop. Any patient at high risk for an STI who presents with neurologic or ophthalmologic symptoms should be tested for syphilis and HIV.⁴⁵

Pregnant women who have a diagnosis of syphilis should be treated with penicillin immediately because treatment ≥ 30 days prior to delivery is likely to prevent most ­cases of congenital syphilis. However, a course of penicillin might not prevent stillbirth or congenital syphilis in a gravely infected fetus, evidenced by fetal syphilis on a sonogram at the time of treatment. Additional doses of penicillin in pregnant women with early syphilis might be indicated if there is evidence of ­fetal syphilis on ultrasonography. All women who deliver a stillborn infant (≥ 20 weeks’ ­gestation) should be tested for syphilis at ­delivery.⁴⁶

All patients in whom primary or secondary syphilis has been diagnosed should be tested for HIV at the time of diagnosis and treatment; if the result is negative, they should be offered preexposure prophylaxis (PrEP; discussed shortly). If the incidence of HIV in your community is high, repeat testing for HIV in 3 months. Clinical and serologic evaluation should be performed 6 and 12 months after treatment.⁴⁷

Treatment. Penicillin remains the standard treatment for syphilis. Primary, secondary, and early tertiary stages (including in pregnancy) are treated with benzathine penicillin G 2.4 million units intramuscular (IM) in a single dose. For pregnant patients, repeating that dose in 1 week generally is recommended. Patients in the late latent (> 1 year) or tertiary stage receive the same dose of penicillin, which is then repeated weekly, for a total of 3 doses. Doxycycline and ceftriaxone are alternatives, except in ­pregnancy.

Antivirals will not eradicate latent herpesvirus; rather, the goals of treatment are to attenuate current infection, prevent recurrence, and improve quality of life.

Warn patients of the Jarisch-Herxheimer reaction: fever, headache, and myalgias associated with initiation of treatment in the presence of the high bacterial load seen in early syphilis. Treatment is symptomatic, but the Jarisch-Herxheimer reaction can cause fetal distress in pregnancy.

Otosyphilis, ocular syphilis, and neurosyphilis require intravenous (IV) aqueous crystalline penicillin G 3 to 4 million U every 4 hours for 10 to 14 days.⁴⁵ Alternatively, procaine penicillin G 2.4 million U/d IM can be given daily with oral probenecid 500 mg qid, both for 10 to 14 days (TABLE 2¹⁴).

Screening andprevention of STIs

Screening recommendations

Follow USPSTF screening guidelines for STIs.^10,48-54 Screen annually for:

• gonorrhea and chlamydia in women ages 15 to 24 years and in women older than 25 years if they are at increased risk
• gonorrhea, chlamydia, syphilis, and HIV in MSM, and hepatitis C if they are HIV positive
• trichomoniasis in women who are HIV positive.

Continue to: Consider the community in which...

Vaccination against human papillomavirus is not universally recommended for women ages 27 to 45 years because most people have been exposed to HPV by that age.

Consider the community in which you practice when determining risk; you might want to consult local public health authorities for information about local epidemiology and guidance on determining which of your patients are at increased risk.

Preexposure prophylaxis

According to the CDC, all sexually active adults and adolescents should be informed about the availability of PrEP to prevent HIV infection. PrEP should be (1) available to anyone who requests it and (2) recommended for anyone who is sexually active and who practices sexual behaviors that place them at substantial risk for exposure to or acquisition of HIV, or both.

The recommended treatment protocol for men and women who have either an HIV-positive partner or inconsistent condom use or who have had a bacterial STI in the previous 6 months is oral emtricitabine 200 mg plus tenofovir disoproxil fumarate 300 mg/d (sold as Truvada-F/TDF). Men and transgender women (ie, assigned male at birth) with at-risk behaviors also can use emtricitabine plus tenofovir alafenamide 25 mg/d (sold as Descovy-F/TAF).

In addition, cabotegravir plus rilpirivine (sold as Cabenuva), IM every 2 months, was approved by the FDA for PrEP in 2021.

Pregnant women who have syphilis should be treated with penicillin immediately: Treatment ≥ 30 days prior to delivery is likely to prevent most cases of congenital syphilis.

Creatinine clearance should be assessed at baseline and yearly (every 6 months for those older than 50 years) in patients taking PrEP. All patients must be tested for HIV at initiation of treatment and every 3 months thereafter (every 4 months for cabotegravir plus rilpirivine). Patients should be screened for bacterial STIs every 6 months (every 3 months for MSM and transgender women); screening for chlamydia should be done yearly. For patients being treated with emtricitabine plus tenofovir alafenamide, weight and a lipid profile (cholesterol and triglycerides) should be assessed annually.⁵⁵

Postexposure prophylaxis

The sharp rise in the incidence of STIs in the past few years has brought renewed interest in postexposure prophylaxis (PEP) for STIs. Although PEP should be standard in cases of sexual assault, this protocol also can be considered in other instances of high-risk exposure.

CDC recommendations for PEP in cases of assault are⁵⁶:

• ceftriaxone 500 mg IM in a single dose (1 g if weight is ≥ 150 kg) plus
• doxycycline 100 mg bid for 7 days plus
• metronidazole 2 g bid for 7 days (for vaginal exposure)
• pregnancy evaluation and emergency contraception
• hepatitis B risk evaluation and vaccination, with or without hepatitis B immune globulin
• HIV risk evaluation, based on CDC guidelines, and possible HIV prophylaxis (PrEP)
• HPV vaccination for patients ages 9 to 26 years if they are not already fully vaccinated.

CORRESPONDENCE
Belinda Vail, MD, 3901 Rainbow Boulevard, Mail Stop 4010, Kansas City, KS 66160; [email protected]

Evidence summary

Continuous glucose monitoring: Nonsignificant reductions in event rates

A 2021 multicenter RCT (N = 175) evaluated CGM effectiveness in patients with basal ­insulin–treated T2D.¹ Patients (mean age, 57 years; mean A1C, 9.1%) wore a blinded CGM device for baseline glucose measurement (minimum of 168 hours) before being randomly assigned to either CGM (n = 116) or traditional blood glucose monitoring (BGM; n = 59). At 8-month follow-up, patients in the BGM group again had blinded sensors placed. A significant reduction in hypoglycemia duration was observed for the CGM group vs the BGM group at 8 months for glucose values < 70 mg/mL (adjusted mean difference [aMD] = –0.24%; 95% CI, –0.42 to –0.05) and < 54 mg/dL (aMD = –0.10%; 95% CI, –0.15 to –0.04). A nonsignificant decrease in severe hypoglycemic events requiring resuscitative assistance occurred for BGM (2%) vs CGM (1%) patients. Study limitations included virtual visits due to COVID-19 and a short follow-­up period.

A 2022 multicenter prospective study (N = 174) examined CGM effects on hypoglycemia frequency and severity in adults with T2D.² Patients with insulin-requiring T2D (mean age, 61 years; mean A1C, 8.0%) participated in a 12-month study with 6 months of self-monitored blood glucose (SMBG) followed by 6 months of CGM use. The primary outcome was the rate of severe hypoglycemic events. A nonsignificant decrease was observed in the CGM group compared to the SMBG group for hypoglycemic event rate, per participant per 6-month period (relative risk [RR] = 0.43; 95% CI, 0.07-2.64). Four moderate hypoglycemic adverse events occurred in the SMBG phase vs 2 in the CGM phase. Financial support by the study sponsor decreases the study’s validity.

A 2021 prospective study (N = 90) evaluated the use of CGM to improve glycemic control.³ Patients younger than 66 years with insulin-treated T2D and an A1C > 7.5% participated in a 7-day blinded CGM cycle every 4 months for 1 year. A nonsignificant decrease in hypoglycemia duration was observed for glucose values < 70 mg/dL and < 54 mg/dL at 12 months. No change in hypoglycemic event rate was seen with the use of CGM. Funding by the device manufacturer was a limitation of this study.

Flash glucose monitoring: Mixed results on hypoglycemia events

A 2019 open-label RCT (N = 82) assessed the effectiveness of FGM on diabetes control.⁴ Patients with insulin-treated T2D were randomly assigned to the intervention or standard­-care groups. The intervention group (n = 46; mean age, 66 years; mean A1C, 8.3%) used the FGM system for 10 weeks, while the standard-care group (n = 36; mean age, 70 years; mean A1C, 8.9%) maintained use of their glucometers. Both groups received similar types and duration of counseling. Treatment satisfaction was the primary outcome; total hypoglycemic events was a secondary outcome. No significant difference in the number of hypoglycemic episodes was observed between the intervention and control groups at 55 to 70 mg/dL (RR = 0.79; 95% CI, 0.44-1.4) or < 54 mg/dL (RR = 1.27; 95% CI, 0.38-4.2). No adverse events of severe hypoglycemia occurred during the study. Funding by the device manufacturer was a limitation of this study.

Continuous glucose monitoring and flash glucose monitoring do not decrease symptomatic hypoglycemia episodes but do lower time in hypoglycemia.

A 2017 open-label, multicenter RCT (N = 224) assessed FGM efficacy.⁵ Adults (mean age, 59 years; mean A1C, 8.8%) with T2D on intensive insulin therapy were randomized to FGM (n = 149) or SMBG (n = 75) after a 14-day masked baseline period. The 6-month treatment phase was unblinded. The duration of hypoglycemic events (glucose values < 70 mg/dL and < 55 mg/dL) was obtained from the sensors. Compared to the SMBG group, the FGM group spent 43% less time at < 70 mg/dL (aMD = –0.47 ± 0.13 h/d; P = .0006) and 53% less time at < 55 mg/dL (aMD = –0.22 ± 0.068 h/d; P = .0014). Hypoglycemic event rates significantly decreased by 28% (aMD = –0.16 ± 0.065; P = 0.016) and 44% (aMD = –0.12 ± 0.037; P = .0017) for glucose levels < 70 mg/dL and < 55 mg/dL, respectively. A nonsignificant difference occurred in severe hypoglycemic events requiring third-party assistance for the FGM (2%) vs control (1%) groups. Involvement of the device manufacturer and unblinded group allocations are study limitations.

A 2021 single-arm, multicenter prospective study looked at the impact of FGM on glycemic control in adults with insulin-treated T2D (N = 90; mean age, 64 years; mean A1C, 7.5%).⁶ After a 14-day baseline period consisting of masked sensor readings paired with self-monitored fingerstick tests, participants were followed for 11 weeks using the sensor to monitor glucose levels. The primary outcome was amount of time spent in hypoglycemia (< 70 mg/dL), with secondary outcomes including time and events in hypoglycemia (< 70, < 55, or < 45 mg/dL). No significant decrease in hypoglycemia duration or hypoglycemic event rates at < 70, < 55, or < 45 mg/­dL was observed for FGM compared to baseline. Adverse events were observed in 64% of participants; 94% of the events were hypoglycemia related. Serious adverse events were reported for 5.3% of participants. The single-arm study format, lack of generalizability due to the single-race study population, and sponsor support were study limitations.

Editor’s takeaway

This reasonably good evidence shows a decrease in measured or monitored hypoglycemia, a disease-oriented outcome, but it did not reach statistical significance for symptomatic hypoglycemia (1% vs 2%), a patient-oriented outcome. Nevertheless, in patients reporting symptomatic hypoglycemia, a continuous or flash glucose monitor may allow for more aggressive glucose control.

Evidence summary

Continuous glucose monitoring: Nonsignificant reductions in event rates

A 2021 multicenter RCT (N = 175) evaluated CGM effectiveness in patients with basal ­insulin–treated T2D.¹ Patients (mean age, 57 years; mean A1C, 9.1%) wore a blinded CGM device for baseline glucose measurement (minimum of 168 hours) before being randomly assigned to either CGM (n = 116) or traditional blood glucose monitoring (BGM; n = 59). At 8-month follow-up, patients in the BGM group again had blinded sensors placed. A significant reduction in hypoglycemia duration was observed for the CGM group vs the BGM group at 8 months for glucose values < 70 mg/mL (adjusted mean difference [aMD] = –0.24%; 95% CI, –0.42 to –0.05) and < 54 mg/dL (aMD = –0.10%; 95% CI, –0.15 to –0.04). A nonsignificant decrease in severe hypoglycemic events requiring resuscitative assistance occurred for BGM (2%) vs CGM (1%) patients. Study limitations included virtual visits due to COVID-19 and a short follow-­up period.

A 2022 multicenter prospective study (N = 174) examined CGM effects on hypoglycemia frequency and severity in adults with T2D.² Patients with insulin-requiring T2D (mean age, 61 years; mean A1C, 8.0%) participated in a 12-month study with 6 months of self-monitored blood glucose (SMBG) followed by 6 months of CGM use. The primary outcome was the rate of severe hypoglycemic events. A nonsignificant decrease was observed in the CGM group compared to the SMBG group for hypoglycemic event rate, per participant per 6-month period (relative risk [RR] = 0.43; 95% CI, 0.07-2.64). Four moderate hypoglycemic adverse events occurred in the SMBG phase vs 2 in the CGM phase. Financial support by the study sponsor decreases the study’s validity.

A 2021 prospective study (N = 90) evaluated the use of CGM to improve glycemic control.³ Patients younger than 66 years with insulin-treated T2D and an A1C > 7.5% participated in a 7-day blinded CGM cycle every 4 months for 1 year. A nonsignificant decrease in hypoglycemia duration was observed for glucose values < 70 mg/dL and < 54 mg/dL at 12 months. No change in hypoglycemic event rate was seen with the use of CGM. Funding by the device manufacturer was a limitation of this study.

Flash glucose monitoring: Mixed results on hypoglycemia events

A 2019 open-label RCT (N = 82) assessed the effectiveness of FGM on diabetes control.⁴ Patients with insulin-treated T2D were randomly assigned to the intervention or standard­-care groups. The intervention group (n = 46; mean age, 66 years; mean A1C, 8.3%) used the FGM system for 10 weeks, while the standard-care group (n = 36; mean age, 70 years; mean A1C, 8.9%) maintained use of their glucometers. Both groups received similar types and duration of counseling. Treatment satisfaction was the primary outcome; total hypoglycemic events was a secondary outcome. No significant difference in the number of hypoglycemic episodes was observed between the intervention and control groups at 55 to 70 mg/dL (RR = 0.79; 95% CI, 0.44-1.4) or < 54 mg/dL (RR = 1.27; 95% CI, 0.38-4.2). No adverse events of severe hypoglycemia occurred during the study. Funding by the device manufacturer was a limitation of this study.

Continuous glucose monitoring and flash glucose monitoring do not decrease symptomatic hypoglycemia episodes but do lower time in hypoglycemia.

A 2017 open-label, multicenter RCT (N = 224) assessed FGM efficacy.⁵ Adults (mean age, 59 years; mean A1C, 8.8%) with T2D on intensive insulin therapy were randomized to FGM (n = 149) or SMBG (n = 75) after a 14-day masked baseline period. The 6-month treatment phase was unblinded. The duration of hypoglycemic events (glucose values < 70 mg/dL and < 55 mg/dL) was obtained from the sensors. Compared to the SMBG group, the FGM group spent 43% less time at < 70 mg/dL (aMD = –0.47 ± 0.13 h/d; P = .0006) and 53% less time at < 55 mg/dL (aMD = –0.22 ± 0.068 h/d; P = .0014). Hypoglycemic event rates significantly decreased by 28% (aMD = –0.16 ± 0.065; P = 0.016) and 44% (aMD = –0.12 ± 0.037; P = .0017) for glucose levels < 70 mg/dL and < 55 mg/dL, respectively. A nonsignificant difference occurred in severe hypoglycemic events requiring third-party assistance for the FGM (2%) vs control (1%) groups. Involvement of the device manufacturer and unblinded group allocations are study limitations.

A 2021 single-arm, multicenter prospective study looked at the impact of FGM on glycemic control in adults with insulin-treated T2D (N = 90; mean age, 64 years; mean A1C, 7.5%).⁶ After a 14-day baseline period consisting of masked sensor readings paired with self-monitored fingerstick tests, participants were followed for 11 weeks using the sensor to monitor glucose levels. The primary outcome was amount of time spent in hypoglycemia (< 70 mg/dL), with secondary outcomes including time and events in hypoglycemia (< 70, < 55, or < 45 mg/dL). No significant decrease in hypoglycemia duration or hypoglycemic event rates at < 70, < 55, or < 45 mg/­dL was observed for FGM compared to baseline. Adverse events were observed in 64% of participants; 94% of the events were hypoglycemia related. Serious adverse events were reported for 5.3% of participants. The single-arm study format, lack of generalizability due to the single-race study population, and sponsor support were study limitations.

Editor’s takeaway

This reasonably good evidence shows a decrease in measured or monitored hypoglycemia, a disease-oriented outcome, but it did not reach statistical significance for symptomatic hypoglycemia (1% vs 2%), a patient-oriented outcome. Nevertheless, in patients reporting symptomatic hypoglycemia, a continuous or flash glucose monitor may allow for more aggressive glucose control.

Evidence summary

Continuous glucose monitoring: Nonsignificant reductions in event rates

A 2021 multicenter RCT (N = 175) evaluated CGM effectiveness in patients with basal ­insulin–treated T2D.¹ Patients (mean age, 57 years; mean A1C, 9.1%) wore a blinded CGM device for baseline glucose measurement (minimum of 168 hours) before being randomly assigned to either CGM (n = 116) or traditional blood glucose monitoring (BGM; n = 59). At 8-month follow-up, patients in the BGM group again had blinded sensors placed. A significant reduction in hypoglycemia duration was observed for the CGM group vs the BGM group at 8 months for glucose values < 70 mg/mL (adjusted mean difference [aMD] = –0.24%; 95% CI, –0.42 to –0.05) and < 54 mg/dL (aMD = –0.10%; 95% CI, –0.15 to –0.04). A nonsignificant decrease in severe hypoglycemic events requiring resuscitative assistance occurred for BGM (2%) vs CGM (1%) patients. Study limitations included virtual visits due to COVID-19 and a short follow-­up period.

A 2022 multicenter prospective study (N = 174) examined CGM effects on hypoglycemia frequency and severity in adults with T2D.² Patients with insulin-requiring T2D (mean age, 61 years; mean A1C, 8.0%) participated in a 12-month study with 6 months of self-monitored blood glucose (SMBG) followed by 6 months of CGM use. The primary outcome was the rate of severe hypoglycemic events. A nonsignificant decrease was observed in the CGM group compared to the SMBG group for hypoglycemic event rate, per participant per 6-month period (relative risk [RR] = 0.43; 95% CI, 0.07-2.64). Four moderate hypoglycemic adverse events occurred in the SMBG phase vs 2 in the CGM phase. Financial support by the study sponsor decreases the study’s validity.

A 2021 prospective study (N = 90) evaluated the use of CGM to improve glycemic control.³ Patients younger than 66 years with insulin-treated T2D and an A1C > 7.5% participated in a 7-day blinded CGM cycle every 4 months for 1 year. A nonsignificant decrease in hypoglycemia duration was observed for glucose values < 70 mg/dL and < 54 mg/dL at 12 months. No change in hypoglycemic event rate was seen with the use of CGM. Funding by the device manufacturer was a limitation of this study.

Flash glucose monitoring: Mixed results on hypoglycemia events

A 2019 open-label RCT (N = 82) assessed the effectiveness of FGM on diabetes control.⁴ Patients with insulin-treated T2D were randomly assigned to the intervention or standard­-care groups. The intervention group (n = 46; mean age, 66 years; mean A1C, 8.3%) used the FGM system for 10 weeks, while the standard-care group (n = 36; mean age, 70 years; mean A1C, 8.9%) maintained use of their glucometers. Both groups received similar types and duration of counseling. Treatment satisfaction was the primary outcome; total hypoglycemic events was a secondary outcome. No significant difference in the number of hypoglycemic episodes was observed between the intervention and control groups at 55 to 70 mg/dL (RR = 0.79; 95% CI, 0.44-1.4) or < 54 mg/dL (RR = 1.27; 95% CI, 0.38-4.2). No adverse events of severe hypoglycemia occurred during the study. Funding by the device manufacturer was a limitation of this study.

Continuous glucose monitoring and flash glucose monitoring do not decrease symptomatic hypoglycemia episodes but do lower time in hypoglycemia.

A 2017 open-label, multicenter RCT (N = 224) assessed FGM efficacy.⁵ Adults (mean age, 59 years; mean A1C, 8.8%) with T2D on intensive insulin therapy were randomized to FGM (n = 149) or SMBG (n = 75) after a 14-day masked baseline period. The 6-month treatment phase was unblinded. The duration of hypoglycemic events (glucose values < 70 mg/dL and < 55 mg/dL) was obtained from the sensors. Compared to the SMBG group, the FGM group spent 43% less time at < 70 mg/dL (aMD = –0.47 ± 0.13 h/d; P = .0006) and 53% less time at < 55 mg/dL (aMD = –0.22 ± 0.068 h/d; P = .0014). Hypoglycemic event rates significantly decreased by 28% (aMD = –0.16 ± 0.065; P = 0.016) and 44% (aMD = –0.12 ± 0.037; P = .0017) for glucose levels < 70 mg/dL and < 55 mg/dL, respectively. A nonsignificant difference occurred in severe hypoglycemic events requiring third-party assistance for the FGM (2%) vs control (1%) groups. Involvement of the device manufacturer and unblinded group allocations are study limitations.

A 2021 single-arm, multicenter prospective study looked at the impact of FGM on glycemic control in adults with insulin-treated T2D (N = 90; mean age, 64 years; mean A1C, 7.5%).⁶ After a 14-day baseline period consisting of masked sensor readings paired with self-monitored fingerstick tests, participants were followed for 11 weeks using the sensor to monitor glucose levels. The primary outcome was amount of time spent in hypoglycemia (< 70 mg/dL), with secondary outcomes including time and events in hypoglycemia (< 70, < 55, or < 45 mg/dL). No significant decrease in hypoglycemia duration or hypoglycemic event rates at < 70, < 55, or < 45 mg/­dL was observed for FGM compared to baseline. Adverse events were observed in 64% of participants; 94% of the events were hypoglycemia related. Serious adverse events were reported for 5.3% of participants. The single-arm study format, lack of generalizability due to the single-race study population, and sponsor support were study limitations.

Editor’s takeaway

This reasonably good evidence shows a decrease in measured or monitored hypoglycemia, a disease-oriented outcome, but it did not reach statistical significance for symptomatic hypoglycemia (1% vs 2%), a patient-oriented outcome. Nevertheless, in patients reporting symptomatic hypoglycemia, a continuous or flash glucose monitor may allow for more aggressive glucose control.

Whenever someone asks me what I do, I happily reply, “I’m just a simple country doctor.” That is, in part, why I am honored to be granted the opportunity to serve as editor-in-chief of The Journal of Family Practice (JFP). As our late colleague Dr. John Hickner noted in his first JFP editorial, he and the 2 editors-in-chief before him (Drs. Jeff Susman and Mark Ebell) were also of the small-town family doc tradition.¹

My goal as this journal’s editorin-chief will be to continue its high academic standing while maintaining its utility for busy clinicians.

My small-town roots trace back to rural South Carolina. I am a first-generation college student and attended medical school on a Navy Health Professions Scholarship. After completing my residency training, I had the privilege of serving for 5 years in the Navy (2 of those years were overseas), where I practiced and taught full-scope family medicine. I saw patients of all ages, attended deliveries, and provided inpatient hospital care, as well as performed a full range of procedures and tests, including colposcopies, skin procedures, vasectomies, flexible sigmoidoscopies, and exercise treadmill testing.

Following military service and completion of a 2-year fellowship and Master of Public Health degree (while working nights at a rural emergency department), I began work at the University of North Carolina at Chapel Hill. I had the good fortune of spending the next 11 years as a faculty member there, where I advanced my research and teaching career. In 2017, I was named the Chair of Family Medicine and Community Health at Duke University School of Medicine, where I continue to have an active outpatient practice.

My experiences have shaped my belief that it is critical that family medicine maintain its presence (and advance its prominence) both in our communities and at our large academic medicine centers, championing service to rural areas, promoting health equity, and advocating for the importance of high-quality primary care delivery and training. No matter where we are, our work is valuable, and we make a difference. Like my predecessors, I have a love of evidence-based medicine. I also have a love of writing, which I can trace back to my days as an intern. I am excited to be able to apply what I have learned over the years to help maintain the rigor, practicality, and relevance of JFP while simultaneously helping to nurture new authors and peer reviewers.

My goal as this journal’s editor-in-chief will be to continue its high academic standing while maintaining its utility for busy clinicians. The provision of evidence-based clinical review articles that are succinct and practical, along with departments (eg, Photo Rounds, Behavioral Health Consult, Practice Alert, PURLs), will remain the journal’s major focus. Within this framework, I also want to share the best evidence and ideas on other aspects of practicing medicine, such as quality improvement, population health, and health equity. I’ll be looking to increase recruitment and mentorship of authors from diverse backgrounds, including those historically ­underrepresented in medicine.

I look forward to working with the editorial board, associate and assistant editors, and staff of JFP to serve the diverse interests and needs of our readers. To that end, we’ll be looking for your guidance. How else can JFP help you in your day-to-day practice? Please let us know your ideas. Drop us a line at [email protected].

Finally, please join me in thanking Drs. Henry Barry and Kate Rowland for all of their work this past year in keeping JFP going strong!

Whenever someone asks me what I do, I happily reply, “I’m just a simple country doctor.” That is, in part, why I am honored to be granted the opportunity to serve as editor-in-chief of The Journal of Family Practice (JFP). As our late colleague Dr. John Hickner noted in his first JFP editorial, he and the 2 editors-in-chief before him (Drs. Jeff Susman and Mark Ebell) were also of the small-town family doc tradition.¹

My goal as this journal’s editorin-chief will be to continue its high academic standing while maintaining its utility for busy clinicians.

My small-town roots trace back to rural South Carolina. I am a first-generation college student and attended medical school on a Navy Health Professions Scholarship. After completing my residency training, I had the privilege of serving for 5 years in the Navy (2 of those years were overseas), where I practiced and taught full-scope family medicine. I saw patients of all ages, attended deliveries, and provided inpatient hospital care, as well as performed a full range of procedures and tests, including colposcopies, skin procedures, vasectomies, flexible sigmoidoscopies, and exercise treadmill testing.

Following military service and completion of a 2-year fellowship and Master of Public Health degree (while working nights at a rural emergency department), I began work at the University of North Carolina at Chapel Hill. I had the good fortune of spending the next 11 years as a faculty member there, where I advanced my research and teaching career. In 2017, I was named the Chair of Family Medicine and Community Health at Duke University School of Medicine, where I continue to have an active outpatient practice.

My experiences have shaped my belief that it is critical that family medicine maintain its presence (and advance its prominence) both in our communities and at our large academic medicine centers, championing service to rural areas, promoting health equity, and advocating for the importance of high-quality primary care delivery and training. No matter where we are, our work is valuable, and we make a difference. Like my predecessors, I have a love of evidence-based medicine. I also have a love of writing, which I can trace back to my days as an intern. I am excited to be able to apply what I have learned over the years to help maintain the rigor, practicality, and relevance of JFP while simultaneously helping to nurture new authors and peer reviewers.

My goal as this journal’s editor-in-chief will be to continue its high academic standing while maintaining its utility for busy clinicians. The provision of evidence-based clinical review articles that are succinct and practical, along with departments (eg, Photo Rounds, Behavioral Health Consult, Practice Alert, PURLs), will remain the journal’s major focus. Within this framework, I also want to share the best evidence and ideas on other aspects of practicing medicine, such as quality improvement, population health, and health equity. I’ll be looking to increase recruitment and mentorship of authors from diverse backgrounds, including those historically ­underrepresented in medicine.

I look forward to working with the editorial board, associate and assistant editors, and staff of JFP to serve the diverse interests and needs of our readers. To that end, we’ll be looking for your guidance. How else can JFP help you in your day-to-day practice? Please let us know your ideas. Drop us a line at [email protected].

Finally, please join me in thanking Drs. Henry Barry and Kate Rowland for all of their work this past year in keeping JFP going strong!

Whenever someone asks me what I do, I happily reply, “I’m just a simple country doctor.” That is, in part, why I am honored to be granted the opportunity to serve as editor-in-chief of The Journal of Family Practice (JFP). As our late colleague Dr. John Hickner noted in his first JFP editorial, he and the 2 editors-in-chief before him (Drs. Jeff Susman and Mark Ebell) were also of the small-town family doc tradition.¹

My goal as this journal’s editorin-chief will be to continue its high academic standing while maintaining its utility for busy clinicians.

My small-town roots trace back to rural South Carolina. I am a first-generation college student and attended medical school on a Navy Health Professions Scholarship. After completing my residency training, I had the privilege of serving for 5 years in the Navy (2 of those years were overseas), where I practiced and taught full-scope family medicine. I saw patients of all ages, attended deliveries, and provided inpatient hospital care, as well as performed a full range of procedures and tests, including colposcopies, skin procedures, vasectomies, flexible sigmoidoscopies, and exercise treadmill testing.

Following military service and completion of a 2-year fellowship and Master of Public Health degree (while working nights at a rural emergency department), I began work at the University of North Carolina at Chapel Hill. I had the good fortune of spending the next 11 years as a faculty member there, where I advanced my research and teaching career. In 2017, I was named the Chair of Family Medicine and Community Health at Duke University School of Medicine, where I continue to have an active outpatient practice.

My experiences have shaped my belief that it is critical that family medicine maintain its presence (and advance its prominence) both in our communities and at our large academic medicine centers, championing service to rural areas, promoting health equity, and advocating for the importance of high-quality primary care delivery and training. No matter where we are, our work is valuable, and we make a difference. Like my predecessors, I have a love of evidence-based medicine. I also have a love of writing, which I can trace back to my days as an intern. I am excited to be able to apply what I have learned over the years to help maintain the rigor, practicality, and relevance of JFP while simultaneously helping to nurture new authors and peer reviewers.

My goal as this journal’s editor-in-chief will be to continue its high academic standing while maintaining its utility for busy clinicians. The provision of evidence-based clinical review articles that are succinct and practical, along with departments (eg, Photo Rounds, Behavioral Health Consult, Practice Alert, PURLs), will remain the journal’s major focus. Within this framework, I also want to share the best evidence and ideas on other aspects of practicing medicine, such as quality improvement, population health, and health equity. I’ll be looking to increase recruitment and mentorship of authors from diverse backgrounds, including those historically ­underrepresented in medicine.

I look forward to working with the editorial board, associate and assistant editors, and staff of JFP to serve the diverse interests and needs of our readers. To that end, we’ll be looking for your guidance. How else can JFP help you in your day-to-day practice? Please let us know your ideas. Drop us a line at [email protected].

Finally, please join me in thanking Drs. Henry Barry and Kate Rowland for all of their work this past year in keeping JFP going strong!

A 29-YEAR-OLD MAN was referred to the emergency department for fever and rash. Two months prior, he had noticed painful spots on his toes (FIGURE 1). Soon after, a rash of different morphology appeared on his chest and upper extremities. Associated symptoms included hair loss, generalized arthralgias, chills, trouble with balance, and photophobia. The patient denied genital lesions but reported 3 recent cold sores.

On exam, the patient was febrile (102 °F). Skin exam revealed a generalized maculopapular rash on the trunk, arms, and legs with scattered lesions on the palms ­(FIGURE 2). There were tender purpuric macules on the tips of his toes with areas of blanching. His hands had pink plaques on the dorsal fingers (FIGURE 3). Additionally, there was an erythematous papular rash with scale on his cheeks and nasal bridge, patchy areas of hair loss, and a single oral ulcer.

A neurologic exam was notable for mildly unstable gait, an abnormal Babinski reflex on the left side, and a positive Romberg sign. Musculoskeletal exam revealed joint tenderness in his shoulders, elbows, and wrists. Lymphadenopathy was present bilaterally in the axilla.

Lab work was ordered, including a VDRL test and a treponemal antibodies test. Skin biopsies also were taken from lesions on his arm and chest.

WHAT IS YOUR DIAGNOSIS?
HOW WOULD YOU TREAT THIS PATIENT?

Our patient’s fever and rash were highly suggestive of either systemic lupus erythematosus (SLE) or secondary syphilis (the “great masquerader”).

Dermatologic findings occur in more than 70% of patients with systemic lupus erythematosus.

In addition to the joint tenderness revealed during the musculoskeletal exam, our patient had several nonspecific lupus findings on skin exam: malar rash, discoid rash on hands, subacute vasculitis (generalized rash), alopecia, and an oral ulcer; he also had the specific finding of chilblains vasculitis of the toes. Lab work and pathology results made the diagnosis clear. Lab work revealed leukopenia, an antinuclear antibody (ANA) result of 1:2560 with speckled appearance, and positive anti-SM antibodies. A dipstick was negative for protein; VDRL and treponemal antibodies tests were also negative. Histopathology showed perivascular lymph histiocytic vacuolar dermatitis with a differential of connective tissue disease, including lupus.

Our patient met the criteria

SLE is a systemic autoimmune disease resulting in chronic inflammation in multiple organ systems; it commonly manifests with vague symptoms of fatigue, fever, and weight loss. The prevalence of SLE in the United States has been reported as high as 241 per 100,000 people. ¹ Women are more likely to be affected, and the incidence is highest among Black people and lowest among Caucasians.^1,2 Risk factors include cigarette smoking and exposure to silica particulate air pollution.

The 2019 European League Against Rheumatism/­American College of Rheumatology criteria for a diagnosis of SLE require that a patient have a positive ANA and some, but not all, additive lab, clinical, and organ-specific findings.³ Findings that clinicians should look for include^3,4

• elevated ANA (≥ 1:80)
• constitutional symptoms (fever)
• hematologic findings (leukopenia, thrombocytopenia, autoimmune hemolysis)
• neuropsychiatric findings (delirium, psychosis, seizure)
• mucocutaneous findings (alopecia, oral ulcers, others)
• serosal findings (effusion, acute pericarditis)
• musculoskeletal findings (joint involvement)
• renal findings (proteinuria)
• antiphospholipid antibodies
• decreased complement proteins
• SLE-specific antibodies.

Dermatologic findings occur in more than 70% of patients with SLE.⁵ They can be nonspecific—eg, classic discoid rash, malar rash, alopecia, maculopapular rash (most commonly on sun-exposed areas, mimicking polymorphous light eruption)—or specific (eg, chilblains).⁵

Continue to: The differential for rash and fever is broad

Syphilis also can manifest with rash and fever. The rash of syphilis is nonpainful and affects the torso and face, with concentration on the palms and soles.^6,7It manifests during syphilis’s secondary stage, 6 to 8 weeks after an untreated infection. Fatigue, malaise, lymphadenopathy, mucosal lesions, ocular symptoms, and nephritis can occur.^8,9 The diagnosis is made through treponemal-specific antibody confirmation of a positive rapid plasma reagin test.⁹ Neurosyphilis is diagnosed via lumbar puncture.⁹

Dermatomyositis is a rare disorder of inflammation in both the skin and muscles. Symptoms include rash, muscle aches, and weakness. Lab abnormalities include elevated creatine kinase levels and ANA. Muscle biopsy confirms the diagnosis.

Erythema multiforme is an ­immunologic-mediated rash consisting of firm targetoid erythematous papules distributed symmetrically on the extremities, including palms/soles. It typically appears after a viral infection, immunization, or new medications (eg, antibiotics, nonsteroidal anti-­inflammatory drugs, or phenothiazines) initiated 1 to 3 weeks prior to the appearance of the rash. History and appearance inform the diagnosis.

Polymorphic light eruption is a rash of variable appearance on sun-exposed areas that results from a sensitivity to sunlight after lack of exposure for a period of time. Symptoms include burning and itching.

Treatment and outcome

Treat patients with SLE with hydroxychloroquine (200-400 mg/d) to suppress inflammation and with low-dose oral steroids such as prednisone (7.5 mg/d) for intermittent exacerbations. Higher steroid doses are sometimes needed for signs of organ inflammation. Patients with increased disease activity will require immunosuppressive therapy with ­disease-modifying antirheumatic drugs, such as methotrexate (7.5-25 mg/wk), mycophenolate (2-3 g/d), azathioprine (1.5-2.5 mg/kg/d), and biologic infusions.⁴ Additionally, in 2021, the US Food and Drug Administration approved anifrolumab (Saphnelo) and voclosporin (Lupkynis) for the treatment of SLE.⁴

Our patient was admitted for further evaluation. A lumbar puncture was performed because of his balance issues; it showed an elevated protein level, but further work-up did not find an infectious or malignant source. Balance improved with hydration. The patient remained hospitalized for 9 days, during which his fever subsided. His pain improved after initiation of hydroxychloroquine 400 mg/d. Follow-up with Rheumatology was arranged for further care.

A 29-YEAR-OLD MAN was referred to the emergency department for fever and rash. Two months prior, he had noticed painful spots on his toes (FIGURE 1). Soon after, a rash of different morphology appeared on his chest and upper extremities. Associated symptoms included hair loss, generalized arthralgias, chills, trouble with balance, and photophobia. The patient denied genital lesions but reported 3 recent cold sores.

On exam, the patient was febrile (102 °F). Skin exam revealed a generalized maculopapular rash on the trunk, arms, and legs with scattered lesions on the palms ­(FIGURE 2). There were tender purpuric macules on the tips of his toes with areas of blanching. His hands had pink plaques on the dorsal fingers (FIGURE 3). Additionally, there was an erythematous papular rash with scale on his cheeks and nasal bridge, patchy areas of hair loss, and a single oral ulcer.

A neurologic exam was notable for mildly unstable gait, an abnormal Babinski reflex on the left side, and a positive Romberg sign. Musculoskeletal exam revealed joint tenderness in his shoulders, elbows, and wrists. Lymphadenopathy was present bilaterally in the axilla.

Lab work was ordered, including a VDRL test and a treponemal antibodies test. Skin biopsies also were taken from lesions on his arm and chest.

WHAT IS YOUR DIAGNOSIS?
HOW WOULD YOU TREAT THIS PATIENT?

Our patient’s fever and rash were highly suggestive of either systemic lupus erythematosus (SLE) or secondary syphilis (the “great masquerader”).

Dermatologic findings occur in more than 70% of patients with systemic lupus erythematosus.

In addition to the joint tenderness revealed during the musculoskeletal exam, our patient had several nonspecific lupus findings on skin exam: malar rash, discoid rash on hands, subacute vasculitis (generalized rash), alopecia, and an oral ulcer; he also had the specific finding of chilblains vasculitis of the toes. Lab work and pathology results made the diagnosis clear. Lab work revealed leukopenia, an antinuclear antibody (ANA) result of 1:2560 with speckled appearance, and positive anti-SM antibodies. A dipstick was negative for protein; VDRL and treponemal antibodies tests were also negative. Histopathology showed perivascular lymph histiocytic vacuolar dermatitis with a differential of connective tissue disease, including lupus.

Our patient met the criteria

SLE is a systemic autoimmune disease resulting in chronic inflammation in multiple organ systems; it commonly manifests with vague symptoms of fatigue, fever, and weight loss. The prevalence of SLE in the United States has been reported as high as 241 per 100,000 people. ¹ Women are more likely to be affected, and the incidence is highest among Black people and lowest among Caucasians.^1,2 Risk factors include cigarette smoking and exposure to silica particulate air pollution.

The 2019 European League Against Rheumatism/­American College of Rheumatology criteria for a diagnosis of SLE require that a patient have a positive ANA and some, but not all, additive lab, clinical, and organ-specific findings.³ Findings that clinicians should look for include^3,4

• elevated ANA (≥ 1:80)
• constitutional symptoms (fever)
• hematologic findings (leukopenia, thrombocytopenia, autoimmune hemolysis)
• neuropsychiatric findings (delirium, psychosis, seizure)
• mucocutaneous findings (alopecia, oral ulcers, others)
• serosal findings (effusion, acute pericarditis)
• musculoskeletal findings (joint involvement)
• renal findings (proteinuria)
• antiphospholipid antibodies
• decreased complement proteins
• SLE-specific antibodies.

Dermatologic findings occur in more than 70% of patients with SLE.⁵ They can be nonspecific—eg, classic discoid rash, malar rash, alopecia, maculopapular rash (most commonly on sun-exposed areas, mimicking polymorphous light eruption)—or specific (eg, chilblains).⁵

Continue to: The differential for rash and fever is broad

Syphilis also can manifest with rash and fever. The rash of syphilis is nonpainful and affects the torso and face, with concentration on the palms and soles.^6,7It manifests during syphilis’s secondary stage, 6 to 8 weeks after an untreated infection. Fatigue, malaise, lymphadenopathy, mucosal lesions, ocular symptoms, and nephritis can occur.^8,9 The diagnosis is made through treponemal-specific antibody confirmation of a positive rapid plasma reagin test.⁹ Neurosyphilis is diagnosed via lumbar puncture.⁹

Dermatomyositis is a rare disorder of inflammation in both the skin and muscles. Symptoms include rash, muscle aches, and weakness. Lab abnormalities include elevated creatine kinase levels and ANA. Muscle biopsy confirms the diagnosis.

Erythema multiforme is an ­immunologic-mediated rash consisting of firm targetoid erythematous papules distributed symmetrically on the extremities, including palms/soles. It typically appears after a viral infection, immunization, or new medications (eg, antibiotics, nonsteroidal anti-­inflammatory drugs, or phenothiazines) initiated 1 to 3 weeks prior to the appearance of the rash. History and appearance inform the diagnosis.

Polymorphic light eruption is a rash of variable appearance on sun-exposed areas that results from a sensitivity to sunlight after lack of exposure for a period of time. Symptoms include burning and itching.

Treatment and outcome

Treat patients with SLE with hydroxychloroquine (200-400 mg/d) to suppress inflammation and with low-dose oral steroids such as prednisone (7.5 mg/d) for intermittent exacerbations. Higher steroid doses are sometimes needed for signs of organ inflammation. Patients with increased disease activity will require immunosuppressive therapy with ­disease-modifying antirheumatic drugs, such as methotrexate (7.5-25 mg/wk), mycophenolate (2-3 g/d), azathioprine (1.5-2.5 mg/kg/d), and biologic infusions.⁴ Additionally, in 2021, the US Food and Drug Administration approved anifrolumab (Saphnelo) and voclosporin (Lupkynis) for the treatment of SLE.⁴

Our patient was admitted for further evaluation. A lumbar puncture was performed because of his balance issues; it showed an elevated protein level, but further work-up did not find an infectious or malignant source. Balance improved with hydration. The patient remained hospitalized for 9 days, during which his fever subsided. His pain improved after initiation of hydroxychloroquine 400 mg/d. Follow-up with Rheumatology was arranged for further care.

A 29-YEAR-OLD MAN was referred to the emergency department for fever and rash. Two months prior, he had noticed painful spots on his toes (FIGURE 1). Soon after, a rash of different morphology appeared on his chest and upper extremities. Associated symptoms included hair loss, generalized arthralgias, chills, trouble with balance, and photophobia. The patient denied genital lesions but reported 3 recent cold sores.

On exam, the patient was febrile (102 °F). Skin exam revealed a generalized maculopapular rash on the trunk, arms, and legs with scattered lesions on the palms ­(FIGURE 2). There were tender purpuric macules on the tips of his toes with areas of blanching. His hands had pink plaques on the dorsal fingers (FIGURE 3). Additionally, there was an erythematous papular rash with scale on his cheeks and nasal bridge, patchy areas of hair loss, and a single oral ulcer.

A neurologic exam was notable for mildly unstable gait, an abnormal Babinski reflex on the left side, and a positive Romberg sign. Musculoskeletal exam revealed joint tenderness in his shoulders, elbows, and wrists. Lymphadenopathy was present bilaterally in the axilla.

Lab work was ordered, including a VDRL test and a treponemal antibodies test. Skin biopsies also were taken from lesions on his arm and chest.

WHAT IS YOUR DIAGNOSIS?
HOW WOULD YOU TREAT THIS PATIENT?

Our patient’s fever and rash were highly suggestive of either systemic lupus erythematosus (SLE) or secondary syphilis (the “great masquerader”).

Dermatologic findings occur in more than 70% of patients with systemic lupus erythematosus.

In addition to the joint tenderness revealed during the musculoskeletal exam, our patient had several nonspecific lupus findings on skin exam: malar rash, discoid rash on hands, subacute vasculitis (generalized rash), alopecia, and an oral ulcer; he also had the specific finding of chilblains vasculitis of the toes. Lab work and pathology results made the diagnosis clear. Lab work revealed leukopenia, an antinuclear antibody (ANA) result of 1:2560 with speckled appearance, and positive anti-SM antibodies. A dipstick was negative for protein; VDRL and treponemal antibodies tests were also negative. Histopathology showed perivascular lymph histiocytic vacuolar dermatitis with a differential of connective tissue disease, including lupus.

Our patient met the criteria

SLE is a systemic autoimmune disease resulting in chronic inflammation in multiple organ systems; it commonly manifests with vague symptoms of fatigue, fever, and weight loss. The prevalence of SLE in the United States has been reported as high as 241 per 100,000 people. ¹ Women are more likely to be affected, and the incidence is highest among Black people and lowest among Caucasians.^1,2 Risk factors include cigarette smoking and exposure to silica particulate air pollution.

The 2019 European League Against Rheumatism/­American College of Rheumatology criteria for a diagnosis of SLE require that a patient have a positive ANA and some, but not all, additive lab, clinical, and organ-specific findings.³ Findings that clinicians should look for include^3,4

• elevated ANA (≥ 1:80)
• constitutional symptoms (fever)
• hematologic findings (leukopenia, thrombocytopenia, autoimmune hemolysis)
• neuropsychiatric findings (delirium, psychosis, seizure)
• mucocutaneous findings (alopecia, oral ulcers, others)
• serosal findings (effusion, acute pericarditis)
• musculoskeletal findings (joint involvement)
• renal findings (proteinuria)
• antiphospholipid antibodies
• decreased complement proteins
• SLE-specific antibodies.

Dermatologic findings occur in more than 70% of patients with SLE.⁵ They can be nonspecific—eg, classic discoid rash, malar rash, alopecia, maculopapular rash (most commonly on sun-exposed areas, mimicking polymorphous light eruption)—or specific (eg, chilblains).⁵

Continue to: The differential for rash and fever is broad

Syphilis also can manifest with rash and fever. The rash of syphilis is nonpainful and affects the torso and face, with concentration on the palms and soles.^6,7It manifests during syphilis’s secondary stage, 6 to 8 weeks after an untreated infection. Fatigue, malaise, lymphadenopathy, mucosal lesions, ocular symptoms, and nephritis can occur.^8,9 The diagnosis is made through treponemal-specific antibody confirmation of a positive rapid plasma reagin test.⁹ Neurosyphilis is diagnosed via lumbar puncture.⁹

Dermatomyositis is a rare disorder of inflammation in both the skin and muscles. Symptoms include rash, muscle aches, and weakness. Lab abnormalities include elevated creatine kinase levels and ANA. Muscle biopsy confirms the diagnosis.

Erythema multiforme is an ­immunologic-mediated rash consisting of firm targetoid erythematous papules distributed symmetrically on the extremities, including palms/soles. It typically appears after a viral infection, immunization, or new medications (eg, antibiotics, nonsteroidal anti-­inflammatory drugs, or phenothiazines) initiated 1 to 3 weeks prior to the appearance of the rash. History and appearance inform the diagnosis.

Polymorphic light eruption is a rash of variable appearance on sun-exposed areas that results from a sensitivity to sunlight after lack of exposure for a period of time. Symptoms include burning and itching.

Treatment and outcome

Treat patients with SLE with hydroxychloroquine (200-400 mg/d) to suppress inflammation and with low-dose oral steroids such as prednisone (7.5 mg/d) for intermittent exacerbations. Higher steroid doses are sometimes needed for signs of organ inflammation. Patients with increased disease activity will require immunosuppressive therapy with ­disease-modifying antirheumatic drugs, such as methotrexate (7.5-25 mg/wk), mycophenolate (2-3 g/d), azathioprine (1.5-2.5 mg/kg/d), and biologic infusions.⁴ Additionally, in 2021, the US Food and Drug Administration approved anifrolumab (Saphnelo) and voclosporin (Lupkynis) for the treatment of SLE.⁴

Our patient was admitted for further evaluation. A lumbar puncture was performed because of his balance issues; it showed an elevated protein level, but further work-up did not find an infectious or malignant source. Balance improved with hydration. The patient remained hospitalized for 9 days, during which his fever subsided. His pain improved after initiation of hydroxychloroquine 400 mg/d. Follow-up with Rheumatology was arranged for further care.