detection of chlamydia trachomatis, mycoplasma hominis and ureaplasma urealyticum by multiplex pcr in semen sample of infertile men

background: the aim of this study was to detect chlamydia trachomatis, mycoplasma hominis and ureaplasma urealyti cum from semen samples of infertile men by multiplex pcr and investigation of influence of bacteriospermia on semen parame ters. methods: semen samples of 200 infertile men were evaluated by multiplex pcr. in addition, analysis of semen parameters was performed according to the who guidelines. results: all the patients were without clinical symptoms of urogenital tract infection. thirty three percent of cases showed at least one bacterium. we found a noticeable relation between the presence of bacteriospermia and the rate of non motile and morphologically abnormal sperms (p 0.05). conclusion: asymptomatic existence of chlamydia and mycoplasmas in urogenital tracts might play an important role in sperm impairment due to infertility. bacteriospermia can influence sperm's motility, morphology and concentration.