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Fasciolopsis buski is a parasitic flatworm, also known as a trematode, that infects humans and swine. This infection, called fasciolopsiasis, occurs when metacercariae (encysted larvae) are ingested on aquatic plants.12

Once inside the host, the larvae mature into adult worms, which can reach up to 7.5 cm (3 inches) in length and attach to the small intestine. Symptoms can include abdominal pain, diarrhea, nausea, and constipation. Severe infestations can lead to weakness and fluid retention, particularly in children.1

Treatment typically involves medication such as praziquantel. Prevention includes thoroughly boiling aquatic plants before consumption.1

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3 Britannica Sources
  1. fasciolopsiasis
  2. fluke
  3. fascioliasis

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