Paragonimus westermani

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Par·a·gon·i·mus wes·ter·man·'i

the bronchial or lung fluke; a species that causes paragonimiasis, found chiefly in Japan, Korea, Taiwan, China, the Philippines, and Thailand; eggs are coughed up in sputum or swallowed and passed in the feces; miracidia invade Melania snails, and produce large numbers of stumpy-tailed cercariae that leave the snail and crawl into muscles and viscera of crayfish or crabs and encyst; in humans the excysted worms invade the wall of the gut and migrate through the diaphragm into the lungs; the developing parasites cause an intense inflammatory reaction and eventually induce fibrous-walled nodules that usually contain a pair of adult worms, along with exudate, eggs, and remains of red blood cells; the fibroparasitic nodules may become contiguous and form multiloculated cystlike structures; in some instances, the flukes involve the brain, liver, peritoneum, intestine, or skin.
Synonym(s): Paragonimus ringeri
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Paragonimus westermani

The lung fluke, a common parasite of certain mammals including humans, dogs, cats, pigs, and minks. Human infestation occurs through eating partially cooked crabs or crayfish, the second intermediate host. This infestation is endemic in certain parts of Asia. See: illustration
See also: Paragonimus


a genus of trematode parasites in the family Paragonimidae. Causes paragonimiasis.

Paragonimus africanus, Paragonimus caliensis, Paragonimus iloktsuenensis, Paragonimus mexicanus, Paragonimus ohirai, Paragonimus peruvianus, Paragonimus uterobilateralis
found in the lungs of a large number of animal species.
Paragonimus kellicotti
found in the lungs of cat, dog and pig. Mink and muskrat are the probable primary hosts.
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Ova of Paragonimus kellicotti. By permission from Nelson RW, Couto CG, Small Animal Internal Medicine, Mosby, 2003
Paragonimus westermani
found in the lungs and other organs of most animal species, and humans.
References in periodicals archive ?
IgG to other parasites including Paragonimus westermani , Paragonimiasis sichuanensis , Schistosoma japonicum , and Spirometra mansoni were all negative.
Clinicoradiologic features of pleuropulmonary Paragonimus westermani on Kyusyu Island, Japan.
Entre estas se encuentran: Paragonimus westermani, identificado principalmente en el Sureste y Lejano Oriente de Asia (es el que afecta mas frecuentemente al hombre); Paragonimus africanus, presente en el oeste de Africa; Paragonimus mexicanus, prevalente en Centroamerica y Suramerica; Paragonimus kellicotti, ubicado en Norteamerica (14,17-19); Paragonimus vietnamiensis que se describe como una nueva especie, reportada en Vietnam (19,20) y Paragonimus maripurensis, presente en India (21).
Melanoides tuberculata is medically important because this specie serve as intermediate host for the human lung fluke, Paragonimus westermani.
Prevalence of Paragonimus westermani in some Ulchin school children.
tuberculata acts as first intermediate host for human lung fluke Paragonimus westermani [2].
Characterization and localization of Paragonimus westermani antigen stimulating antibody formation in both the infected cat and rat.
Further cases included those with positive enzyme-linked immunoabsorbent assays (ELISA) or immunoblots for Paragonimus westermani antibodies and those without travel or diet histories, implicating imported paragonimiasis.
He tentatively identified the worm as Paragonimus westermani (a new Lake region distribution record) and stated that to his knowledge no previous record existed of an opossum hosting a species of Paragonimus.
Genomic characterization of lung flukes, Paragonimus heterotremus, Paragonimus siamensis, Paragonimus harinasutai, Paragonimus westermani and Paragonimus bangkokensis by RAPD markers.
Serologic testing is an important tool for diagnosing infections with Paragonimus westermani, a related fluke, but experience with its use in P.