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Cysticercosis

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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This the condition when there is infection with Taenia solium and human tissue is invaded by the larval form.

  • natural life cycle of T solium is for a human host infected with the adult intestinal worm to shed eggs (ova), which can survive for several months before ingestion, or egg-filled motile worm segments (gravid proglottids) into the environment
    • are subsequently ingested by pigs through contamination of their diet

  • ova hatch within the porcine gastrointestinal tract to become oncospheres, invade the mucosa to gain access to the bloodstream, migrate to various tissues and encyst to become cysticerci

  • when a human ingests encysted pork, the cysticerci attach to the intestinal mucosa and mature into adult tapeworms, completing the life cycle

  • human neurocysticercosis is an aberration of this life cycle and occurs when a human (rather than a pig) ingests the ova of T solium

  • cysticerci (cysts) form within various human tissues (cysticercosis), much the same as within the porcine host

 


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