Question
The following are images of an intestinal nematode. Which of these are true about it?
| A. |
Transmitted through percutaneous and auto-inoculation
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| B. |
Embryonated egg is the infectious stage for this worm
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| C. |
The adult worm usually lives in the small intestine
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| D. |
Triclabendazole is the drug of choice
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Show Answer
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Correct Answer � D
Explanation
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|
Ans: D. Triclabendazole is the drug of choice
(Ref Paniker’s 7/e p172, 6/e p166; Jawetz 27/e p724; Harrison 19/e p1416)
- Image suggestive of Trichuris trichura.
Forms:
Embryonated forms:
- Egg also present in image.
- Infectious stage.
- Transmitted via oral route.
Adults:
Adult female whipworms:
- Approximately 30-50 mm in length.
Adult male worms:
- Slender anterior end.
- Thicker posterior end.
- Hence appears “buggy whip” → hence name “whipworm”.
- Usually lives in large intestine & appendix.
Life cycle:
- Eggs passed in feces → Eggs infective after about 3 weeks of incubation in moist & shady soil.
- Humans acquire infection by eating foods contaminated with infective eggs.
- Swallowed eggs → larvae hatch in small intestine → mature & migrate to colon- → Cycle continues.
- DOC: Thiabendazole.
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