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Liver fluke (Fasciola spp.)

Image Number: 99793B

Caption:

Liver fluke, a trematode liver parasite - helminth (Fasciola spp.) Mouth and pharynx of the adult liver fluke. Humans are infected by ingestion of uncooked aquatic vegetation on which the metacercariae stage is encysted. Metacercariae excyst in the duodenum and migrate through the intestinal wall in to the peritoneal cavity. The larvae enter the liver by penetrating the capsule and wander through the liver parenchyma for up to 9 weeks. Most damage is done in the liver parenchyma by physical irritation and metabolic by products.

Keywords:

| 99793B invertebrate invertebrates trematode liver fluke sheep oral sucker parasite helminth Fasciola zoonotic disease parenchyma cyst human disease animal disease zoonoses infection intestine parasitic aquatic SEM |

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