• Sexually transmitted disease (STD)
  • Associated with high prevalence of other STDs
  • Causes urogenital infections
  • Sequelae:
    • May cause premature rupture of membranes or preterm labor in pregnancy
    • May cause low–birth-weight newborns
    • May facilitate transmission of HIV
  • Prevalence:
    • 3–5 million cases per year in U.S.
    • 35% of women treated in STD clinics
    • Overall prevalence 3.1%:
      • Prevalence in black women 13.3%
  • Incubation 4–28 d
  • May be asymptomatic


Trichomonas vaginalis:
  • Flagellated protozoan:
    • Commonly found in urethra, bladder, and Skene gland

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