Capillaria hepatica

Capillaria hepatica
One of the plates published with the original description of the species, showing the masses of eggs in the liver of the host (above) and free alive eggs (below).
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Nematoda
Class: Enoplea
Order: Enoplida
Family: Capillariidae
Genus: Capillaria
Species:
C. hepatica
Binomial name
Capillaria hepatica
Bancroft, 1893

Capillaria hepatica is a parasitic nematode which causes hepatic capillariasis in rodents and numerous other mammal species, including humans. The life cycle of C. hepatica may be completed in a single host species. However, the eggs, which are laid in the liver, must mature outside of the host body (in the environment) prior to infecting a new host. Death and decomposition of the host in which the adults reach sexual maturity are necessary for completion of the life cycle.