Abstract
Objective To investigate the effects of two biovars of ureaplasma urealyticum on leukocyte concentration and sperm motion parameters. Methods Sperm motion parameters were analyzed with computer-aided sperm analysis (CASA). Leukocytic number of semen was measured with benziding-perxidase staining. Culturing and real-time polymerase chain reaction (RT-PCR) was used to identify biovars of U. urealyticum in the semen. Results Sperm motion parameters including mean curvilinear velocity (VCL), mean straight-line velocity (VSL), mean average path (VAP), and mean beat Cross frequency (BCF) showed significant difference between infertile and normal group (P<0.05). Biovar Ⅱ infected men displayed significant increase in leukocyte counts (P<0.001). When compared to uninfected group, the sperm motion parameters showed significant decreases of VCL, VSL, VAP, mean percentage lineality (LIN), and swing(WOB) in biovar Ⅱ(P<0.05). Conclusions Biovar Ⅱhas closer relationship with leukocyte elevation and sperm motion impairment. Key words: Ureaplasma urealyticum; Spermatozoa; Semen/CY
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