Flukes are parasitic flatworms that infect the blood vessels, gastrointestinal tract, lungs, or liver. They are often categorized according to the principle organ system they invade:
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Clonorchis sinensis, Fasciola hepatica, and Opisthorchis species: Liver and bile ducts
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Fasciolopsis buski, Heterophyes heterophyes, and related organisms: Lumen of the gastrointestinal tract
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Paragonimus westermani and related species: Lungs
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Schistosoma species: Vasculature of the gastrointestinal or genitourinary system
