We conducted a respondent driven sampling
survey to estimate HIV prevalence and risk behavior among
men who have sex with men (MSM) in Unguja, Zanzibar.
Men aged C15 years living in Unguja and reporting anal
sex with another man in the past 3 months were asked to
complete a questionnaire and provide specimens for biologic
testing. HIV prevalence was 12.3% (95% confidence
interval 8.7, 16.3). HIV infection was associated with
injecting drugs in the past 3 months, Hepatitis C virus
infection and being paid for sex in the past year. Interventions
for MSM in Zanzibar are needed and should include
linkages to prevention, care and treatment services.