- Main host is cattle and dogs
- Eggs ingested by humans → travel to liver
- Found in Africa, Europe, Asia, the Middle East; Central, South, and North America
- Exposure via working w/sheep/dogs, consumption of soil/water/food (containing eggs) contaminated w/feces from infected animals
- Cysts form in liver & can cause RUQ pain→ compress biliary tract; if cysts, rupture can cause anaphylaxis