What is trichomoniasis? Why is it classified as an STD?
Trichomoniasis is an extra-intestinal protozoan infection caused by Trichomonas vaginalis, a flagellate protozoan. The parasite infects the urinary tract of males and females. In females it causes discharge, pain and itching. Trichomoniasis is an STD because its main mode of transmission is sexual contact.
