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Trichuris (view source)

Revision as of 10:32, 14 August 2007

91 bytes added ,  10:32, 14 August 2007
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* Also known as the  "'''whipworm'''"
 
* Also known as the  "'''whipworm'''"
 
** Derives its name from its characteristic whiplike shape
 
** Derives its name from its characteristic whiplike shape
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* Adult buries its thin anterior half into the intestinal mucosa and feeds on tissue secretions (not blood).
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** The cecum and colon are the most commonly infected sites.
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** Causes eosinophilia.
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==Species==
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* ''Trichuris vulpis'' - dog whipworm
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* ''Trichuris campanula'' (Europe) and ''Trichuris serrata'' (North America) - cat whipworms.
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** Are quite rare.
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* ''Trichuris suis'' - pig whipworm
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==Life Cycle==
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* Faeco-oral spread
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* Eggs become infective after 10-14 days in soil.
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* Larvae hatch in small intestine.
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** Grow and moult.
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* Finally take up resisidence in large intestine.
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** I.e. NO tissue migratory phase.
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==Clinical==
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* Adult buries its thin anterior half into the intestinal mucosa and feeds on tissue secretions (not blood).  
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Pathophysiology: After 10-14 days in soil, eggs become infective. Trichuriasis is transmitted by the fecal-oral route, as with A lumbricoides, but in contrast to this parasite and to hookworm, no tissue migratory phase occurs. Larvae hatch in the small intestine, where they grow and molt, finally taking up residence in the large intestine. The time from ingestion of eggs to development of mature worms is approximately 3 months. Adult females lay eggs for up to 5 years.
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** The cecum and colon are the most commonly infected sites.
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** Causes eosinophilia.
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*Signs may include:
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** Diarrhoea
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*** [Intestines  - Catarrhal Enteritis#Parasites|Catarrhal enteritis]]
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** Anemia
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** Dehydration
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