Many other trichomonads reside as commensals in the gastrointestinal tract of other species. Two of the most well studied trichomonads are ''[[Trichomonas gallinae]]'', which occurs in birds, and "[[Trichomonas vaginalis]]", which is a common sexually transmitted infection of humans.
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Many other trichomonads reside as commensals in the gastrointestinal tract of other species. Two of the most well studied trichomonads are ''[[Trichomonas gallinae]]'', which occurs in birds, and ''Trichomonas vaginalis'', which is a common sexually transmitted infection of humans.