Raw or undercooked meat and seafood should be avoided. Humans contract infective cysticerci by eating raw or undercooked meat. Humans consume tissue cysts when eating raw or undercooked meat (particularly pork and lamb). Infection occurs when undercooked meat is ingested. These contaminated tissues are then consumed through raw or undercooked meat. It is due to eating contaminated undercooked beef or pork. Cat feces and undercooked meats may contain the parasite Toxoplasma gondii and can cause toxoplasmosis. It is usually contracted after eating undercooked contaminated pork. Infection occurs when raw or undercooked fish contaminated with the metacercariae are eaten. Parasites may be in the feces if undercooked meat was consumed. Trichinosis is mainly spread when undercooked meat containing "Trichinella" cysts is eaten. Taeniasis is contracted after eating undercooked pork or beef that contain the larvae. "Toxoplasma gondii" is a parasite that may be found in raw or undercooked meat. Other common vehicles include raw or undercooked fish and shellfish. People are infected after eating raw or undercooked fish.