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Fasciola hepatica

parasitic flatworm in mammal livers

Fasciola hepatica is the common liver fluke. It is a parasitic trematode (fluke or flatworm) in the phylum Platyhelminthes.

Fasciola hepatica
Fasciola hepatica.JPG
Fasciola hepatica – adult worm
Scientific classification
Binomial name
Fasciola hepatica
Linnaeus, 1758

It infects the livers of various mammals, including humans. The disease caused by the fluke is called fascioliasis. It has been classified as a neglected tropical disease.[1]

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.

Life cycleEdit

Life cycle of Fasciola hepatica inside and outside of a human or animal body

To complete its life cycle, F. hepatica needs a freshwater snail as an intermediate host, where the parasite can reproduce asexually.

Adult fasciola are captured in the bile passage of sheep or many reproduce by parthenogenesis.

A Fasciola may be about 3000-4000 eggs at a time.

The zygote is forms in the ootype and recieve yolk from vitaline gland and hard internal cover thrught shell gland.


  1. "Neglected Tropical Diseases". June 6, 2011. Retrieved 28 November 2014.