Trichuris trichiura


Trichuris trichiura
A nematode (roundworm) also called the human whipworm. The third most common round worm of humans. Occurs worldwide, with infections more frequent in areas with tropical weather and poor sanitation practices, and among children. It is estimated that 800 million people are infected worldwide. Trichuriasis (infection with Trichuris trichiura) occurs in the southern United States. The adult worms (approximately 4 cm in length) live in the cecum and ascending colon (the first part of the large intestine). Female worms in the cecum shed between 3,000 and 20,000 eggs per day. The unembryonated eggs are passed with the stool. In the soil they embryonate and become infective in 15 to 30 days. After ingestion (soil-contaminated hands or food), the eggs hatch in the small intestine, and release larvae that mature and establish themselves as adults in the colon. The adult worms are fixed in that location, with the anterior portions threaded into the mucosa (the lining) of the intestine. The females begin to oviposit (lay eggs) 60 to 70 days after infection. The life span of the adults is about 1 year.

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the species that principally infects humans; it is about 5 cm long, with the front part of its body (the esophageal zone) thin like a hair.

Trichuris trichiura adults. Their anterior region is tapered; the posterior end of the male is coiled and that of the female is straight.


Medical dictionary. 2011.

Look at other dictionaries:

  • Trichuris trichiura — Trichuris trichiura …   Wikipédia en Français

  • trichuris trichiura — género de gusanos que parasitan el intestino del hombre. Usualmente no produce síntomas pero a veces es causa de trastornos intestinales y nerviosos fotografía [véase http://www.iqb.es/diccio/t/tr.htm#trichuris] Diccionario ilustrado de Términos… …   Diccionario médico

  • Trichuris trichiura —   Trichuris trichiura …   Wikipedia Español

  • Trichuris trichiura — Peitschenwurm Ei des Peitschenwurmes (Trichuris trichiura) Systematik Klasse: Adenophorea …   Deutsch Wikipedia

  • Trichuris trichiura — Trichocé …   Wikipédia en Français

  • Trichuris — Género de gusanos nematodos parásitos de los que la especie Trichuris trichiura infesta el tracto intestinal. Diccionario Mosby Medicina, Enfermería y Ciencias de la Salud, Ediciones Hancourt, S.A. 1999 …   Diccionario médico

  • Trichuris trichuria — Peitschenwurm Ei des Peitschenwurmes (Trichuris trichiura) Systematik Klasse: Adenophorea …   Deutsch Wikipedia

  • Trichuris — Taxobox name = Trichurida regnum = Animalia phylum = Nematoda classis = Adenophorea subclassis = Enoplia ordo = Trichurida familia = Trichuridae genus = Trichuris subdivision ranks = Species subdivision = Trichuris trichiura Trichuris vulpis… …   Wikipedia

  • Trichuris — A genus of aphasmid nematodes (sometimes improperly termed Trichocephalus) related to the trichina worm, Trichinella spiralis, and having a body with a slender, elongated, anterior portion threaded into the mucosa of the colon or large intestine… …   Medical dictionary

  • Trichocephale — Trichuris trichiura Trichuris trichiura …   Wikipédia en Français


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