Quick Answer

The only reliable way to avoid trichomoniasis is to abstain from vaginal, oral, or anal sex, or to use latex condoms correctly every time you have sex. Because the parasite can infect the urethra and vagina, consistent condom use reduces but does not eliminate risk. Regular STI testing is also important, as many people have no symptoms.

  • Trichomoniasis is caused by the parasite Trichomonas vaginalis.
  • It is the most common curable STI worldwide, per CDC.
  • Many infected people have no symptoms, so testing is key.
  • Condoms reduce risk but do not cover all exposed areas.
  • The infection is curable with a single dose of metronidazole or tinidazole.
  • Untreated trichomoniasis can increase HIV risk and cause pregnancy complications.

Context Most Pages Skip

Trichomoniasis is a parasitic sexually transmitted infection caused by Trichomonas vaginalis. Unlike bacterial or viral STIs, it is caused by a protozoan that can survive outside the body for a short time. The parasite infects the urogenital tract, and because it often causes no symptoms, many people unknowingly pass it to partners. Understanding how it spreads and how to prevent it is essential for sexual health.

Related Questions

⚕️ This page is educational and does not replace advice from a licensed clinician. If you may have been exposed to an STI, get tested — most infections are manageable, and many are fully curable.

Sources & Further Reading

Figures reflect CDC surveillance and WHO estimates; they are population statistics, not personal risk predictions.