If the normal acidity of the vagina changes, the protozoan may overgrow the normal microbial population of the vagina and cause trichomoniasis. Males rarely have any symptoms. Females have a discharge of pus. The life cycle of these organisms is complex. The stage that is involved in the transmission of the organism is called a sporozoite.
Cats are a critical part of the life cycle.
It is usually acquired by eating undercooked meats but can also be acquired by contact with cat feces. Primary problem is a congenital infection of fetus, resulting in either a stillbirth or a child with severe brain damage or vision problems.