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Paper I — 2025 March (Supplementary (SAY)) (2019 Scheme) — Qix

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Paper I
2025 March (Supplementary (SAY)) (2019 Scheme) · 100 marks · 180 min

Question

Fungal infection of a nail (Onychomycosis) is caused by

  1. Candida species
  2. Microsporum species
  3. Trichophyton species
  4. Epidermophydon species a) 1, 2, 3 are correct b) 1, 3, 4 are correct c) 1, 4 are correct d) 2, 4 are correct
  • a) 1, 2, 3 are correct
  • b) 1, 3, 4 are correct
  • c) 1, 4 are correct
  • d) 2, 4 are correct
Qix1 marksMCQs

Answer

Key facts regarding onychomycosis (fungal nail infection): most commonly caused by dermatophytes, particularly Trichophyton rubrum (the leading cause worldwide) and Trichophyton mentagrophytes; less commonly caused by non-dermatophyte moulds (e.g., Aspergillus, Fusarium species) and by Candida species (particularly involving fingernails, often associated with chronic paronychia/frequent water exposure). Diagnosis relies on KOH microscopy of nail clippings/scrapings demonstrating fungal hyphae or yeast/pseudohyphae, and culture on Sabouraud dextrose agar for definitive species identification. 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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