Lying as it does in the channel of the blood charged with the products
of absorption from the intestine, the liver is especially liable to
parasites. Among protozoa are: Monocercomonas hepatica (pigeon),
saccharomyces guttulatus (rabbit), eimeria falciformis (rabbit),
coccidium oviforme (rabbit, pig, dog). Among the lower cryptogams are
actinomyces (ox, pig). Of the tapeworm family are: Cysticercus
tenuicollis (ruminants, pig), c. pisiformis (rabbit), c. cellulosa (dog,
pig), echinococcus veterinorum (animals, man), tænia fimbriata (sheep,
deer), and an undetermined cœnurus (cat). Of trematodes are: Distoma
hepatica (herbivora, man), distoma lanceolatum (herbivora, man), distoma
giganteum, or Americanum (cattle), d. truncatum, d. conjunctum, d.
campanulatum (dog), amphistoma explanatum (ox). Of nematodes are:
Stephanurus dentatus, ascaris suis, oesophagostoma dentatum (pig),
sclerostoma equinum, ascaris megalocephala (horse), ascaris bovis (ox),
oesophagostoma columbiana (in ruminants), filaria hepatica, enstrongylus
gigas, ascaris marginata (dog), ollulanus tricuspis, ascaris mystax
(cat). (See Parasites).