Keywords: Trichomonas LifeCycle.gif Trichomoniasis Trichomonas vaginalis Life cycle of Trichomonas vaginalis Trichomonas vaginalis resides in the female lower genital tract and the male urethra and prostate where it replicates by binary fission The parasite does not appear to have a cyst form and does not survive well in the external environment Trichomonas vaginalis is transmitted among humans its only known host primarily by sexual intercourse http //www dpd cdc gov/dpdx/images/ParasiteImages/S-Z/Trichomoniasis/Trichomonas_LifeCycle gif PD-USGov Trichomonas v life cycle CDC lifecycles |