|Fasciola hepatica – adult worm|
F. hepatica is distributed worldwide, and has been known as an important parasite of sheep and cattle for hundreds of years. It causes great economic losses in sheep and cattle. Because of its size and economic importance, it has been the subject of many scientific investigations and may be the best-known of any trematode species.
- "Neglected Tropical Diseases". cdc.gov. June 6, 2011. Retrieved 28 November 2014.