Cats get toxoplasmosis primarily by eating infected raw or undercooked meat, birds, rodents, or contaminated soil. The parasite Toxoplasma gondii is released in the cat's digestive system after ingesting tissue cysts in infected prey or meat. Cats then shed infectious eggs (oocysts) in their feces for about two weeks after initial infection. Outdoor cats that hunt animals or those fed raw meat are most at risk of contracting and spreading toxoplasmosis. Indoor cats are less likely to get it unless given raw meat to eat. The oocysts shed by cats require 1 to 5 days outside the body to become infectious to others. Most cats only shed oocysts once after their first exposure and typically develop immunity afterward.