The liver fluke (Fasciola hepatica), though not very frequent in the horse, is not uncommon in the ass.
In the adult state the liver fluke has been known from the earliest times.
Such is seen in the life history of the liver fluke, a flatworm which kills sheep, and in the tapeworm.
Almost all ruminants harbor the liver fluke (Fasciola hepatica).
(a) Flatworms are sometimes parasitic, examples being the tapeworm and liver fluke.