National Center for HIV/AIDS, Viral Hepatitis, STD and TB Prevention
Division of Sexually Transmitted Diseases
Program and Training Branch
Clinical Manifestations and Sequelae
Vaginitis due to T. vaginalis can have a characteristic "frothy" gray or yellow-green vaginal discharge and pruritis.
Cervical petechiae ("strawberry cervix") is a classic
presentation which occurs <2% of cases. T. vaginalis
may also infect the Skene's glands and the urethra and may
be asymptomatic in women.
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T. vaginalis may cause up to 11%-13% of nongonococcal urethritis (NGU) in males, but urethral infection in males is frequently asymptomatic. Urethral trichomoniasis has been associated with increased shedding of HIV in HIV-infected men.