Mpox Infection and Sexually Transmitted Infections: A Cross-Sectional Study from a Secondary Hospital in the May-September 2022 International Outbreak.

The aims of this study were to describe the characteristics of patients infected by mpox in our setting, to determine the prevalence of mpox in samples that are classically used for diagnosing sexually transmitted infections (STIs) such as anal, urethral, pharyngeal, and urine, and to assess the prevalence of coinfection with STIs in the same samples. A cross-sectional study was conducted, collecting all confirmed cases of mpox between June and July 2022 using polymerase chain reaction. Sociodemographic data, HIV and other STI status, and prevalence of mpox and STIs in urethral, anal, pharyngeal, or urine samples were collected. Data from 22 patients were extracted, all of whom were men who have sex with men (MSM) and 54.5% were previously HIV positive. The median age was 43 years. All the skin samples were positive for mpox, followed by anal samples (n = 10, 45.5%). Mpox was isolated in 2 or more samples simultaneously in 12 (54%) cases. Nine (41%) patients were positive for an STI and four of them had more than one STIs (18.2%). Human mpox has been epidemiologically significant among MSM. Mpox should be investigated not only in skin lesions but also in samples classically used for STIs. Mpox, such as other STIs, shares ways of transmission and coinfection may be underdiagnosed.

Low rate of vaccination and risk of incident hepatitis A among HIV-infected men who have sex with men in Seville, Southern Spain.

BACKGROUND: Periodic outbreaks of hepatitis A (HAV) infection in men who have sex with men (MSM) have been reported. Low vaccination uptake in HIV-infected individuals could drive new outbreaks. We aimed at evaluating the incidence of and risk factors for HAV infection in people living with HIV (PLWH) in our area. We also assessed the rates of HAV vaccination. METHODS: This was a prospective cohort study. 915 patients were included, 272 (30%) of them were anti-HAV seronegative at baseline. RESULTS: Twenty-six (9.6%) susceptible individuals became infected. Incident cases peaked in 2009-2010 and 2017-2018. Incident HAV infection was independently associated with MSM [adjusted odds ratio (95% confidence ratio): 4.39 (1.35-14.27), p=0.014]. One hundred and five (38.6%) HAV seronegative patients were vaccinated, 21 (20%) of them did not respond, and one (1%) patient lost immunity against HAV. Four (29%) non-responders to vaccination showed incident HAV 5-9 years afterwards. CONCLUSIONS: The incidence of HAV infection in a cohort of well-controlled PLWH remains low and stable, with intermittent outbreaks involving mainly non-immunized MSM. A significant proportion of PLWH remain susceptible to HAV infection due to insufficient vaccine uptake and limited response to vaccination. Importantly, patients not responding to HAV vaccination continue at risk of infection.