Fasciola:
Metazoa Platyhelminthes Trematoda Echinosomida Fasciolidae Fasciola

Commonly referred to as the "sheep liver fluke," these parasitic worms will infect you if you eat vegetation that has been contaminated with their eggs. After the eggs hatch in your small intestine, the new worms will migrate through your abdominal cavity, and lodge in the bile ducts of your liver.

Fasciola Hepatica, one of the smaller members of this genus, may wander in your liver for as long as two weeks before entering your bile ducts, resulting in severe liver damage. These worms can also infect your lungs and brain. Symptoms of infection include abdominal pain, diarrhea, fever, and anemia. Particularly serious infections may lead to death.