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 ?
Paragonimus westermani antibody titers were obtained 1 year after the initial presentation and were elevated at 1:32.
Although stool, sputum, and bronchial washings for ova and parasites were negative, Paragonimus westermani titers were elevated.
Prevalence of Paragonimus westermani in some Ulchin school children.
Clinical evaluation of praziquantel (Embay 8440; BiltricideO) in the treatment of Paragonimus westermani.
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.
The authors reported the recovery of 26 specimens of Paragonimus westermani from the lungs of a single opossum trapped in the vicinity of the Lake.
Genomic characterization of lung flukes, Paragonimus heterotremus, Paragonimus siamensis, Paragonimus harinasutai, Paragonimus westermani and Paragonimus bangkokensis by RAPD markers.
The nine studies cover catalytic activity in transcripts from Schistosoma non-autonomous retro-transposons, mobile genetic elements of malaria vectors and other mosquitoes, retro-transposons in the genomes of the digenean parasitic trematodes Clonochis sinensis and Paragonimus westermani, endogenous retro-transposon sequences of the Schistosoma mansoni intermediate snail host Biomphalaria glabrata, the transposon-mediated transgenis of mosquitoes, Schistosome long terminal repeat retro-transposons colonizing Schistosome genomes, Schistosome DNA transposons, and mobile genetic elements resident in hookworm genomes.
Paragonimus Westermani and other Paragonimus species are parasitic organisms that belong to a group of parasites called flukes (flat worms) of the class Trematoda.
How would a patient with a Paragonimus Westermani or Kellicotti infection present?
Pathologic Diagnosis: Pulmonary Infestation by Paragonimus westermani
Paragonimus westermani is a lung fluke first described in Bengal tigers housed in zoos in Hamburg and Amsterdam in 1877.