Trichuris trichiura

Trich·u·ris trich·i·u·'ra

the whipworm of humans, a species that causes trichuriasis; the body is filiform and slender in the anterior three fifths, and more robust posteriorly; females are 4 or 5 cm long, males are shorter (with coiled caudal extremity and a single eversible spicule); eggs are barrel-shaped, 50-56 mcm by 20-22 mcm, with double shell and translucent knobs at each of the two poles; humans are the only susceptible hosts and usually acquire infection by direct finger-to-mouth contact or by ingestion of soil, water, or food that contains larvated eggs (development in the soil takes 3-6 weeks under proper conditions of warmth and moisture, hence distribution is chiefly tropical); larvae escape from eggs in the ileum, mature in approximately a month, and then pass directly into the cecum without undergoing a parenteral migration as occurs with Ascaris lumbricoides; adults may persist for 2-7 years.

Trichuris trichiura

Whipworm Parasitology A common pathogen believed to infect 750 million people worldwide. See Trichiuriasis.

Tri·chu·ris tri·chi·u·ra

(tri-kyūr'is tri-kī-yū'ră) The whipworm of humans; a species that causes trichuriasis. Its body is filiform and slender in the anterior three fifths, and more robust posteriorly. Females are 4-5 cm long, males are shorter (with coiled caudal extremity and a single eversible spicule). Eggs are barrel shaped, 50-56 by 20-22 mcm, with double shell and translucent knobs at each of the two poles. Humans are the only susceptible hosts and usually acquire infection by direct finger-to-mouth contact or by ingestion of soil, water, or food that contains larvated eggs. (Development in the soil takes 3-6 weeks under proper conditions of warmth and moisture; hence, distribution is chiefly tropical). Larvae escape from eggs in the ileum, mature in approximately 1 month, and then pass directly into the cecum without undergoing a parenteral migration such as occurs with Ascaris lumbricoides; adults may persist 2-7 years.

TRICHURIS TRICHIURA: (A) adult female (×4), (B) egg (×500)

TRICHURIS TRICHIURA: (A) adult female (×4), (B) egg (×500)

Trichuris trichiura

A species that infests humans when the ova that have undergone incubation in the soil are ingested. The larvae develop into adults, which inhabit the large intestine. Symptoms of infestation include diarrhea and abdominal pain. Rectal prolapse may occur if a great number of worms are present. Mebendazole is the drug of choice; albendazole or ivermectin may be of benefit. Synonym: whipworm See: illustrationSee also: Trichuris

单词	trichuris trichiura
释义	DictionarySeewhipwormEncyclopediaSeeWhipworm Trichuris trichiura Trich·u·ris trich·i·u·'ra the whipworm of humans, a species that causes trichuriasis; the body is filiform and slender in the anterior three fifths, and more robust posteriorly; females are 4 or 5 cm long, males are shorter (with coiled caudal extremity and a single eversible spicule); eggs are barrel-shaped, 50-56 mcm by 20-22 mcm, with double shell and translucent knobs at each of the two poles; humans are the only susceptible hosts and usually acquire infection by direct finger-to-mouth contact or by ingestion of soil, water, or food that contains larvated eggs (development in the soil takes 3-6 weeks under proper conditions of warmth and moisture, hence distribution is chiefly tropical); larvae escape from eggs in the ileum, mature in approximately a month, and then pass directly into the cecum without undergoing a parenteral migration as occurs with Ascaris lumbricoides; adults may persist for 2-7 years. Trichuris trichiura Whipworm Parasitology A common pathogen believed to infect 750 million people worldwide. See Trichiuriasis. Tri·chu·ris tri·chi·u·ra (tri-kyūr'is tri-kī-yū'ră) The whipworm of humans; a species that causes trichuriasis. Its body is filiform and slender in the anterior three fifths, and more robust posteriorly. Females are 4-5 cm long, males are shorter (with coiled caudal extremity and a single eversible spicule). Eggs are barrel shaped, 50-56 by 20-22 mcm, with double shell and translucent knobs at each of the two poles. Humans are the only susceptible hosts and usually acquire infection by direct finger-to-mouth contact or by ingestion of soil, water, or food that contains larvated eggs. (Development in the soil takes 3-6 weeks under proper conditions of warmth and moisture; hence, distribution is chiefly tropical). Larvae escape from eggs in the ileum, mature in approximately 1 month, and then pass directly into the cecum without undergoing a parenteral migration such as occurs with Ascaris lumbricoides; adults may persist 2-7 years. TRICHURIS TRICHIURA: (A) adult female (×4), (B) egg (×500)TRICHURIS TRICHIURA: (A) adult female (×4), (B) egg (×500) Trichuris trichiura A species that infests humans when the ova that have undergone incubation in the soil are ingested. The larvae develop into adults, which inhabit the large intestine. Symptoms of infestation include diarrhea and abdominal pain. Rectal prolapse may occur if a great number of worms are present. Mebendazole is the drug of choice; albendazole or ivermectin may be of benefit. Synonym: whipworm See: illustrationSee also: Trichuris
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