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