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Paper II — 2024 December (Supplementary) (2019 Scheme) — Qvii

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Paper II
2024 December (Supplementary) (2019 Scheme) · 100 marks · 180 min

Question

Bile-stained eggs are seen in infection with

  1. Ascaris
  2. Hookworm
  3. Trichuris
  4. Taenia a) 1, 2, 3 are correct b) 1, 2, 4 are correct c) 1, 3, 4 are correct d) 2, 3, 4 are correct
  • a) 1, 2, 3 are correct
  • b) 1, 2, 4 are correct
  • c) 1, 3, 4 are correct
  • d) 2, 3, 4 are correct
Qvii1 marksMCQs

Answer

Bile-stained (brown/yellowish, bile-pigmented) eggs are classically seen in stool microscopy in infection with soil-transmitted helminths and other intestinal nematodes/trematodes — most notably Ascaris lumbricoides (both fertilized and unfertilized eggs typically show the characteristic bile-stained, mammillated brown coat) and hookworm (Ancylostoma duodenale/Necator americanus, whose eggs are also bile-stained, though thin-shelled and colourless-appearing under some conditions), as well as Trichuris trichiura (barrel-shaped, bile-stained eggs with polar plugs). This bile staining reflects the eggs’ passage through and exposure to bile in the intestinal tract before excretion in stool. Without the original four numbered statements from the source question, the specific combination intended by the examiner cannot be confirmed.

  1. 1General Parasitology

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