Answer:
Trichomonas vaginalis
Explanation:
Trichomonas vaginalis is a protozoan parasite that causes Trichomonasis.This STD caused by this one-cell organism, is one of the most common infections transmitted sexually.It usually affects the genitourinary tract of both males and females.
Most males who are infected by this parasite hardly know they are being infected by it. Men are typically asymptomatic. But symptoms such as enlarged prostate gland, urethritis, or epididymitis often present themselves later in males.