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Wednesday, April 6, 2011


This helminth is common throughout the world, It affects children especially.
 The male worm is 2-5mm long ans the female 8-13mm. After the ova are swallowed, development takes place in the small intestine, but the adult worms are found chiefly in the colon.
Clinical features
The gravid female worm lays ova around the anus, and causes intense itching, especially at night. The ova are often carries to mouth on the fingers and so reinfection takes place. In females the genitalia may be involved. The adult worms may be seen moving on the buttocks on the stool.
Ova are detected by applying the adhesive surface of cellphone tape to the perianal skin in the morning. This is then examined on a glass slide under the microscope.
A single dose of one of the drugs ( Piperzine 100mg/kg, Pyrantel pamoate 10mg/kg, Mebendazole 1oomg, Albendazole 400 mg, Thiabendazole 25mg/kg, Levamisole 5mg/kg, Pyrvinium 5mg/kg) is given and repeated after 2 weeks to control auto-reinfection. Where infection constantly recurs in a family, each member should be treated with mebendazole 100 mg twice daily for 3 days repeated after 10 days. During this period all night clothes and bed linen are laundered and finger nails must be scrubed before meals.

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