Urogenital trichomoniasis is a protozoan infection of the urogenital system caused by vaginal flagellates of Trichomonas vaginalis, and is also a common female genital disease. Men are often infected through sexual intercourse or the use of contaminated underwear, items and utensils, and the main sites of infection are the urethra and prostate. Renal trichomoniasis is pyelonephritis caused by human vaginal Trichomonas. It can be transmitted through sexual intercourse, or it can cause kidney infection by ascending the urethra or through blood, or it can be indirectly transmitted through underwear, swimming, bathing, toilets, etc. Trichomonal cystitis is a bladder infection caused by human vaginal Trichomonas vaginalis.