Trichomonas vaginalis is a microscopic organism that causes the disease trichomoniasis, which can be sexually transmitted from person to person.

  1. Both men and women may be infected with trichomoniasis. Many people who are infected have no symptoms.
  2. Symptoms in women include:
  3. Unusual and increased vaginal discharge (bubbly, pale green, or gray) with an unpleasant odor
  4. Itching, burning, or redness of the vulva and vagina
  5. Symptoms in men include:
  6. Discharge from the penis
  7. Burning with urination