Liver fluke (trematode), Fasciola sp., SEM

Liver fluke (trematode), Fasciola sp., SEM

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Caption: Coloured scanning electron micrograph (SEM) of Liver fluke, a trematode liver parasite (helminth), Fasciola sp. 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. This liver fluke causes the disease fasciolosis. Magnification x22 when shortest axis printed at 25 millimetres.

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Keywords: 99793a, animal, aquatic, colored, coloured, cyst, disease, echinostomida, electron, false-colored, false-coloured, fasciola, fasciolidae, fasciolosis, fluke, flukes, helminth, hepatica, human, infection, intestine, invertebrate, invertebrates, liver, micrograph, oral, parasite, parasites, parasitic, parenchyma, platyhelminth, platyhelminthes, scanning, sem, sheep, sucker, trematoda, trematode, trematodes, zoonoses, zoonotic

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