Epidemiology of HIV-1 subtypes among men who have sex with men in Cape Town, South Africa. Early studies in Cape Town identified independent HIV-1 epidemics, with distinct viral subtypes, among men who have sex with men (MSM) and the heterosexual population. However, few recent HIV-1 subtype data are available for MSM in South Africa. We examined HIV-1 subtypes among MSM in Cape Town. Self-identified MSM were recruited from geographically and racially disparate communities across Cape Town. Participants completed behavioral questionnaires and underwent HIV testing. Virus isolated from infected participants underwent complete env gp160 sequencing, and HIV-1 subtypes were assigned through phylogenetic analysis.
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