Abstract
BackgroundThe aim of this study was to estimate the prevalence of HIV and other STIs, among MSM from Buenos Aires (2007–2009).MethodsResponding Driven Sampling was used for recruitment of MSM. Participants completed a structured web-based survey and provided biological samples.ResultsA total of 496 MSM were studied for HIV, HBV, HCV, and T pallidum infections. Chlamydia and HPV diagnoses were only performed in 98 and 109 participants, respectively. Prevalence of HIV was 17.3%, HBV 22.9%, HCV 7.5%, T pallidum 20.5%, HPV 83.5%, and C trachomatis 1.7%. In the year prior to the evaluation, 71% of the participants had had sex with men and/or trans and women (MMW) while 29% had not had sex with women (MM). Comparing MM to MMW, prevalence of HIV (30.7% vs. 11.9%, p<0.001), HBV (36.4% vs. 17.8%, p<0.001), T pallidum (32.1% vs. 15.7%, p<0.001), and HPV (88.3% vs. 70.4%, p = 0.039) were significantly higher among MM, whereas no significant differences were found for HCV and C trachomatis. The MM group had also significantly higher HIV incidence (5.60 vs. 4.28 per 100 persons-year, p = 0.032). HPV genotypes 16, 6, and 11 were the most frequently found; 40.7% of the MSM had more than one genotype and one high risk genotype was detected in 43.6% of participants.ConclusionsBoth MM and MMW are at high risk of infection for HIV and other STIs. Rates of HIV, HBV, T pallidum and HPV infections are higher in the MM group.
Highlights
Men who have sex with men (MSM) have been shown to be at disproportionate risk of HIV infection and prevalence rates of HIV among this population are high: 11–20% in Latin American countries and approximately 19% across major cities of the United States [1,2,3]
Rates of other sexually transmitted infections (STI), such as syphilis, gonorrhea, chlamydia, and Human papilloma virus (HPV) are high and increasing among MSM [4,5,6,7], something worrisome given the association of these STIs with other serious illnesses [1,7,8,9,10,11]
The aim of this study was to investigate the prevalence of HIV and other STIs, including, for the first time, HPV and Chlamydia trachomatis, among MSM from Buenos Aires exploring the results according to the type of sex partner
Summary
Men who have sex with men (MSM) have been shown to be at disproportionate risk of HIV infection and prevalence rates of HIV among this population are high: 11–20% in Latin American countries and approximately 19% across major cities of the United States [1,2,3]. HPV infection has been shown to be high among MSM in several studies [7,12,13,14] and has been associated with a variety of cancers in men, including anal, penile and oral cancers. The incidence of anal and oral cancers related to HPV is increasing in the general population and is growing even faster among individuals who are immunocompromised because of HIV infection [15,16,17]. HPV vaccination for adolescent women has been introduced in several countries (including Argentina) with the aim of reducing the incidence of cervical cancer [18]. The aim of this study was to estimate the prevalence of HIV and other STIs, among MSM from Buenos Aires (2007–2009)
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