Parasitic Diseases, Trematodes (Flukes)

Animals Involved

Cats, dogs, rats, other fish­eating mammals, possibly birds are definitive hosts; fish (and snails) are intermediate hosts

Known Distributions

Human illness mainly in Asia, also reported in Siberia; parasites have been found in Europe

Probable Means of Spreading

Ingestion of undercooked freshwater fish containing encysted larvae

Clinical Manifestations in People

Diarrhea with mucus, anorexia, mild epigastric pain or abdominal cramps; malabsorption, weight loss if high parasite burden

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