Classification: ICD-9 121.1; ICD-10 B66.1

Syndromes and synonyms: Chinese liver fluke, Oriental liver fluke.

Agent: Clonorchis sinensis, a trematode (fluke) 10–25 mm long and 3–5 mm wide.

Reservoir: Piscivorous (fish-eating) mammals, including: humans, dogs, cats, pigs, rats, and several species of wild animals. Humans can remain infected for several decades.

Vector: Freshwater operculate snails (mainly Parafossarulus sp. and Bithynia sp.).

Transmission: Consumption of raw or undercooked infected freshwater fish, mainly Cyprinidae (carp and minnows) or shrimp.

Communicability: None.

Cycle: Fish-eating mammals (including humans) shed C. sinensis

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