Cause
Trichomoniasis (trich) is caused by a
tiny
parasite (a one-celled protozoan) that most commonly
is sexually transmitted from an infected person.
In
women, trich organisms usually infect the
vagina,
urethra,
cervix,
bladder, and glands in the genital area, such as
Bartholin's and Skene's glands. See a picture of the
female reproductive system
.
In men,
infections develop in the urethra or under the foreskin of an uncircumcised
penis. See a picture of the
male reproductive system
.