What type of organism causes Trichomoniasis?

Trichomoniasis is caused by a protozoan organism named Trichomonas vaginalis. This is a single-celled parasite that primarily infects the urogenital tract in humans, leading to a sexually transmitted infection (STI). Understanding that Trichomonas vaginalis is a protozoan rather than a bacterium, virus, or fungus is crucial in recognizing the nature of the infection and its treatment. Protozoans are eukaryotic microorganisms distinct from bacteria (prokaryotes), viruses (which require a host to replicate), and fungi (which have a different cellular structure and life cycle). This distinction helps guide appropriate medical responses and interventions for infections caused by different types of organisms.