<protozoa> A flagellated protozoa that can live in the paraurethral glands in asymptomatic males and females, but can cause vaginitis in some cases.

It can survive 24 hours in tap water, in hot tubs, in urine, on toilet seats and in swimming pools, but the usual sequence of infection starts with the deposition of a large inoculum of organisms contained in semen at intercourse.

(19 Jan 1998)