Whipworm


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Related to Whipworm: hookworm, whipworm infection

Whipworm

 

(Trichocephalus trichiurus), a parasitic round-worm, with a gray or reddish body. It is threadlike toward the front, and toward the back it is thickened and, in the male, curled up in a spiral. The length of the male is from 30 to 40 mm and that of the female is from 35 to 50 mm. The whipworm lives parasitically in the human intestines (in the blind gut and, less frequently, in the large intestine, the vermiform appendix, or the rectum). It attaches itself to the wall of the intestine by penetrating the mucous membrane with its thin front end and causes the disease trichuriasis. The whipworm develops without an intermediary host. Outside of the human body the larva develops over a period ranging from 11 to 120 days (depending on the temperature) inside an egg that is lemon-shaped and has plugs at both poles. When the egg lands in the intestines, the larva comes out of the egg and attaches itself to the wall of the intestine.

REFERENCE

Pod’iapol’skaia, V. P., and V. F. Kapustin. Glistnye bolezni cheloveka, 3rd ed. Moscow, 1958.

S. S. SHUL’MAN

References in periodicals archive ?
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Prevalences of roundworm and whipworm infections usually peaked among children 5-14 years of age; hookworm infections peaked in middle-aged age groups in surveys 1 and 2 and in older age groups in survey 3.
In contrast, the pig whipworm causes disease and losses in livestock, but it does not cause disease in humans.
The female whipworm lays 5,000-7,000 eggs a day that pass out with the stool.
The samples revealed 118 'lemon-shaped' Trichuris trichiura eggs -- a type of roundworm commonly called the whipworm -- as well as 1,179 Ascaris lumbricoides, or giant roundworm, eggs.
In the 1930s and '40s when the disease was extremely rare, nearly half of American children had worms such as the tapeworm Ascaris, or the whipworm Trichuris trichuria.
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