Whipworm

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Related to Trichuris trichiura: Enterobius vermicularis

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 ?
DNA was extracted from faecal samples of individuals infected with Ascaris lumbricoides, hookworm, or Trichuris trichiura (common parasites that often co-occur with S.
Os nematelmintos foram Ascaris lumbricoides (1,32%), Trichocephalus trichiurus (0,66%), Enterobius vermiculares (0,33%), Ancylostoma braziliense (0,11%), Ancilostomideos (0,11%) e Trichuris trichiura (0,11%).
Assays to detect beta-tubulin codon 200 polymorphism in Trichuris trichiura and Ascaris lumbricoides.
Seven intestinal parasites; five helminths (Ascaris lumbricoides, Enterobius vermicularis, Trichuris trichiura, Hymenolepis nana and Taenia saginata) and two Protozoa (Entamoeba histolytica and Giardia lamblia) were reported in this study (Table I).
lumbricoides, Trichuris trichiura, and hookworms are the major causes of intestinal parasitic infections.
Asimismo, se estima que alrededor de 2 000 millones de personas pueden estar infestadas por al menos una especie de geohelmintos (como Ascaris lumbricoides, anquilostomas, Trichuris trichiura) y 4 000 millones se encuentran en riesgo de infestacion (2).
Hookworm was the most 371 (51.46%) prevalent intestinal parasite detected, followed by Trichuris trichiura [172 (23.85%)] and Ascaris lumbricoides [178 (24.69%)].