Trichuris trichiura (whipworm)

From Aaushi
Jump to navigation Jump to search


  • common world-wide in tropical & subtropical regions
  • unembryonated eggs passed in the feces develop in the soil
  • several weeks under appropriate soil conditions are required for maturation
  • infection is acquired by ingestion of embryonated eggs


  • ingested eggs release larvae which mature into adults in the large intestine, especially the cecum
  • adults attach to the intestinal mucosa by their long slender anterior end, while the thicker posterior end moves freely within the intestinal lumen
  • adult worms may be found throughout the colon & rectum with heavy infestation
  • females are elongate, males have coiled tails
  • males & females measure up to 5 cm in length
  • adults may survive for 10 years in the intestine of their host
  • eggs are passed unembryonated in the feces

Clinical manifestations


  • diagnosis is made by recovering eggs in the feces
    • barrel-shaped with refractile plugs at both ends
    • 50-55 by 22-24 um
  • quantitation techniques may be used to assess parasitic load & response to therapy



More general terms

Additional terms


  1. Clinical Diagnosis & Management by Laboratory Methods, 19th edition, J.B. Henry (ed), W.B. Saunders Co., Philadelphia, PA. 1996, pg 1283-84
  2. Harrison's Principles of Internal Medicine, 13th ed. Isselbacher et al (eds), McGraw-Hill Inc. NY, 1994, pg 917-19
  3. 3.0 3.1 Blount T, Hartsell A. Tubular Opacities in the Gastrointestinal Tract. N Engl J Med 2017; 377:2375. December 14, 2017 <PubMed> PMID: Free full text <Internet>