The prevalence of bacterial sexually transmitted infections among clients of female sex workers (FSWs) was studied. A total of 156 condoms were collected from clients of 13 sex workers during three consecutive days. Condoms used by clients of FSWs were collected and DNA was extracted from the seminal fluid and used for the diagnosis of Neisseria gonorrhoeae, Chlamydia trachomatis and Trichomonas vaginalis by polymerase chain reaction. The prevalence of N. gonorrhoeae, C. trachomatis and T. vaginalis among clients of FSWs was 4.5% (7/156), 2.5% (4/156) and 7% (11/156), respectively.