Trichomonas is a genus of flagellated protozoa that can infect humans. Trichomonas vaginalis specifically is a sexually transmitted protozoon that is common among sexually active individuals aged 16-35. It infects the vagina in women and urethra in men. Symptoms in women can include excessive discharge and vaginal inflammation, while men may experience thin discharge and prostate issues. Diagnosis involves microscopic examination of discharge or molecular detection methods. Treatment involves metronidazole along with treatment of any sexual partners to prevent reinfection.