title: Ureaplasma urealyticum and Mycoplasma hominis in men attending for routine semen analysis. Prevalence, incidence by age and clinical settings, influence on sperm characteristics, relationship with the leukocyte count and clinical value.
abstract: OBJECTIVE
  To investigate the clinical value of the screening of Ureaplasma urealyticum and Mycoplasma hominis in routine semen analysis.
  
  
  METHODS
  Semen samples of 234 patients with several clinical settings (infertility, varicocele, spontaneous abortion, genital infections, undescended testicles, hemospermia, etc.) were distributed in three study groups: group 1--negative cultures; group 2--normal colonization (< or =10(3) colony-forming units (cfu)/ml), and group --pathogenic colonization (>10(3) cfu/ml). Frequency rates, incidence by age and clinical settings, association with abnormal sperm characteristics (density, vitality, motility and morphology) and with the leukocyte count were investigated.
  
  
  RESULTS
  Prevalence of U. urealyticum was higher than M. hominis (< or = 10(3) cfu/ml: 28.2 vs. 24.8%; >10(3) cfu/ml: 20.5 vs. 13.3%). No difference was detected on the incidence of mycoplasmas by age and clinical settings, as well as in regard to the mean values of sperm density, vitality, motility, oval-headed sperm and leukocyte count (p > 0.05).
  
  
  CONCLUSIONS
  In spite of the high incidence of mycoplasmas, not enough information was available regarding the influence of these microorganisms on the sperm quality and their relationship with the leukocyte count. Therefore, screening of U. urealyticum and M. hominis for routine semen analysis is not clinically relevant.
authors.affiliation: Homero Soares Ramos Laboratory, Petrópolis, R.J., Brazil. fernandoar@md3net.com.br
authors.forename: Fernando Tadeu
authors.initials: FT
authors.lastname: Andrade-Rocha
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D006801:Humans; D015994:Incidence; D007958:Leukocyte Count; D008297:Male; D008875:Middle Aged; D019535:Mycoplasma hominis / Q000302:isolation & purification*; D015995:Prevalence; D012661:Semen / Q000469:parasitology*; D013094:Spermatozoa; D016990:Ureaplasma urealyticum / Q000302:isolation & purification*