Trichinosis, also calle trichinellosis, or trichiniasis, is a parasitic disease caused by eating raw or undercooked pork and wild game infected with the larvae of a species of roundworm Trichinella spiralis, commonly called the trichina worm. The few cases in the United States are mostly the result of eating undercooked game, bear meat, or home reared pigs. It is most common in the developing world and where pigs are commonly fed raw garbage.