Richomonas vaginalis (a protozoan - the smallest, single-celled members of the animal kingdom) causes Trichomoniasis, an infection of the genital and urinary tract, and is passed almost 100% of the...
From google health effects are (see related link):
Women:
Discomfort with intercourse
Itching of the inner thighs
Vaginal discharge (thin, greenish-yellow, frothy or foamy)
Vaginal itching
...