Fasciola hepatica Stor leverikte (Common liver fluke)
Liver flukes of domestic ruminants: | Class: Trematoda (Flukes) | Order: Digenea | Family: Fasciolidae (large liver flukes)
Adult in formalin. Flat hermaphroditic worms (length: 3-4 cm). The anterior end is a cone provided with an oral sucker (mouth + pharynx) and a ventral sucker next to the common genital opening. The testes are light and placed centrally. The vitelline glands form two dark peripheral fringes.		Adult, mounted specimen. All organs are branched. Intestinal caeca most easily visible anteriorly. The uterus is coiling, the cirrus and the ovary are seen immediately posterior to the ventral sucker. The two testes and the vitelline glands connect to the oötype via the spermatic and vitelline ducts, respectively.
Hosts: Sheep, cattle (also in most other mammals, including humans).Intermediate hosts: Pulmonate gastropods (snails), particularly Lymnaea spp.
Location: : Liver (juvenile flukes migrating in parenchyma) and bile ducts (adult foraging flukes).