Classification: ICD-121.2; ICD-10 B66.4

Syndromes and synonyms: Pulmonary distomiasis, lung fluke disease

Agent: Several species of Paragonimus trematode flatworms: P. westermani, P. heterotremus, P. miyazakii, P. skrjabini, and P. hueitungensis (the last two may be the same) in Asia, P. africanus and P. uterobilateralis in Africa, P. mexicanus (P. peruvianus) and P. kellicotti in the Americas.

Reservoir: Humans, dogs, cats, pigs, and wild carnivores.

Vector: Freshwater snails: Semisulcospira, Thiara, Aroapyrgus, and others.

Transmission: By consumption of infected raw, salted, marinated, pickled or undercooked freshwater crabs and crayfish. Infected humans can excrete worm eggs in sputum and feces for up to 20 years. There is no person-to-person transmission.

Cycle

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