LM of giant liver fluke, Fasciola hepatica

LM of giant liver fluke, Fasciola hepatica

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Credit: CLAUDE NURIDSANY & MARIE PERENNOU/SCIENCE PHOTO LIBRARY

Caption: Light micrograph of a giant liver fluke, Fasciola hepatica, a parasite of sheep, cattle & humans. Humans ingest the encysted larvae through eating watercress & water chestnuts. Immature flukes migrate through the duodenum & into the bile ducts via the liver, where they reach maturity and lay eggs. These are passed in faeces which may contaminate lakes and streams. The eggs then hatch to release free-swimming larvae which penetrate the soft tissues of their next hosts, snails. A free-swimming form released from the snails becomes encysted on aquatic vegetation, forming the next infective stage. Magnification unknown.

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Keywords: animal, fasciola hepatica, flatworm, fluke, giant liver, human, invertebrate, invertebrates, light micrograph, liver, liver fluke, nature, parasite, platyhelminthes, wildlife, zoology

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