Liver fluke

Liver flukes are a polyphyletic group of trematodes (phylum Platyhelminthes). Adults of liver flukes are localized in the liver of various mammals, including humans. These flatworms can occur in bile ducts, gallbladder, and liver parenchyma. They feed on blood. Adult flukes produce eggs which are passed into the intestine.

Examples include:
 * Clonorchis sinensis (the "Chinese liver fluke" or the "Oriental liver fluke")
 * Dicrocoelium dendriticum (lancet liver fluke)
 * Fasciola hepatica (the "sheep liver fluke")
 * Fascioloides magna (the "giant liver fluke")
 * Fasciola gigantica
 * Fasciola jacksoni
 * Protofasciola robusta
 * Parafasciolopsis fasciomorphae
 * Opisthorchis viverrini (Southeast Asian liver fluke)
 * Opisthorchis felineus (cat liver fluke).