摘要：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< 0.0001). In addition, sperm concentration was lower in positive cases (P< 0.04). There was no relation between leukocytospermia and bacteriospermia (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.
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