Incidence of sexually transmitted infections among HIV-positive sex workers in KwaZulu-Natal, South Africa

Background: Improved treatment of Sexually transmitted infections (STIs) is associated with decreased HIV incidence. However, the success of such programs among HIV-positive sex workers has not been shown. Goal: The goal of the study was to determine the incidence of STIs (Trichomonas vaginalis, Neisseria gonorrhoeae, and Chlamydia trachomatis infections) among HIV-positive sex workers. Study Design: A cohort of HIV-positive sex workers was treated for all STIs at baseline and observed monthly to detect and treat new infections. Results: Seventy-seven HIV-positive sex workers were followed up for a total of 58.1 women-years. The incidence rate per 100 women-years was 150 (CI: 120-180) T vaginalis infections; 66 (CI: 45- 87) N gonorrhoea infections; 30 (CI: 14 - 42) C trachomatis infections; and 244 (CI: 200-280) STIs of any type. Conclusion: In this cohort of HIV-positive sex workers the incidence of STIs was high, despite their participation in a prevention program comprising monthly STI treatment, counseling, and condom promotion.