A total of 489 patients who had blood tests for antibodies to the human immunodeficiency virus (HIV) were given medical advice for sexually transmitted disease (STD) screening. Of 378 patients who had STD screening, STDs were found to be present in 47%. Among various STDs, non-specific urethritis (NSU) in men and chlamydial genital infection in women were found to be common. When the prevalence of these two diseases were compared with those of a control group the difference was significant.
