HIV infection among STD patients--Kigali, Rwanda, 1988 to 1991.

To follow the progression of HIV seropositivity among heterosexual adults at risk for HIV infection in the country of Rwanda prospectively, up to 100 patients with sexually transmitted diseases (STD) were tested each month from 1988 to 1991 at the health centre of Biryogo, which is located in a very crowded sector of the capital city, Kigali. Each patient had a blood sample tested anonymously for the presence of HIV antibodies. HIV seropositivity was defined as a reactive ELISA test combined to a reactive Western blot test. The overall HIV seropositivity among the 2058 subjects tested was 61%. It was higher (73%) among the 688 women tested as compared to the 1362 men tested (55%; P < 0.001). The per cent HIV seropositivity did not increase between 1988 and 1991, neither among the male nor among the female clinic attenders. However, the per cent seropositivity was higher in the older age groups, especially among the males. This exceedingly high proportion of HIV-infected STD patients in Kigali re-emphasizes the urgent need to include STD treatment, prevention and control among the priority actions for decreasing HIV transmission in African towns. Also, as the per cent seropositivities did not show any trend to increase over the 4-year period considered, we propose that our intensive HIV serosurveillance strategy among STD patients in Kigali be modified, since the plateau of HIV infection appears to have been attained in this particular high-risk population.