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Gut and tissue nematode infections acquired by ingestion 

Gut and tissue nematode infections acquired by ingestion

Chapter:
Gut and tissue nematode infections acquired by ingestion
Author(s):

David I. Grove

DOI:
10.1093/med/9780199204854.003.070905_update_001

Update:

Ascaris suum—pig ascarid possibly adapting to humans in Japan.

Further reading—recent reviews added.

Updated on 31 May 2012. The previous version of this content can be found here.
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date: 27 June 2017

Ascaris lumbricoides (the giant roundworm) is widespread in the tropics and subtropics where sanitation is poor and the soil is contaminated with its eggs. Ingested eggs hatch in the small bowel, cycle through the bloodstream and lungs, then return to the small bowel and develop into adult worms 15 to 30 cm long. Most infections are asymptomatic, but there may be pulmonary infiltrates with eosinophilia, abdominal discomfort and—in children with heavy infections—intestinal obstruction. Infection is diagnosed by finding eggs in the faeces. Treatment is with pyrantel, mebedenazole, or albendazole....

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