Parasite
Trichuris trichiura
Whipworm with barrel-shaped bipolar-plug egg
trik-YOO-ris trik-ee-YOOR-uh
High-yield clue
Barrel- (lemon-) shaped egg with clear bipolar plugs is the classic identification clue; heavy infection is linked to rectal prolapse in children.
Overview
A soil-transmitted intestinal nematode (whipworm) named for its whip-like shape, used in coursework for its distinctive egg morphology and heavy-infection presentation.
Classification
- Nematode (roundworm)
- Soil-transmitted helminth
- Whip-shaped adult
- Resides in the large intestine (cecum/colon)
Lab & identification clues
- Barrel-shaped egg with polar plugs at both ends
- Eggs identified on stool examination
- No larval lung migration (unlike Ascaris/hookworm)
Associations
- Fecal-oral via embryonated eggs from soil
- Heavy load linked to rectal prolapse and colitis vocabulary
- Warm, humid tropical distribution
- Poor sanitation epidemiology
Commonly confused with
- Ascaris lumbricoides
- Enterobius vermicularis
Frequently asked questions
What is Trichuris trichiura?
A soil-transmitted intestinal nematode (whipworm) named for its whip-like shape, used in coursework for its distinctive egg morphology and heavy-infection presentation.
What are the lab clues for Trichuris trichiura?
Lab clues for Trichuris trichiura include Barrel-shaped egg with polar plugs at both ends, Eggs identified on stool examination, and No larval lung migration (unlike Ascaris/hookworm).
What is Trichuris trichiura commonly confused with?
Trichuris trichiura is commonly confused with Ascaris lumbricoides and Enterobius vermicularis.
Original student-study summary. Sources checked: OpenStax Microbiology 2e, NCBI Bookshelf Medical Microbiology, and CDC topic pages where applicable; reviewed 2026-06. Educational only; no diagnosis, treatment, dosing, or specimen-handling guidance.