Diagnostic Laboratory Tests for Chromoblastomycosis
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Questions and Answers

What is the diagnostic feature of chromoblastomycosis when examined microscopically in KOH?

  • Detection of characteristic conidial structures
  • Detection of dark, spherical cells (correct)
  • Detection of extensive hyperplasia of dermal tissue
  • Detection of granulomas

    • How are specimens of scrapings or biopsies from lesions examined for chromoblastomycosis?

  • Microscopically in KOH (correct)
  • Stained with Gram stain
  • Examined under UV light
  • Cultured on IMA or SDA with antibiotics

    • What is the characteristic feature used to identify dematiaceous species?

  • Granulomas and hyperplasia of dermal tissue
  • Inability to grow at 37°C
  • Dark, spherical cells
  • Characteristic conidial structures (correct)

    • How do saprophytic dematiaceous molds differ from pathogenic species?

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