Moderate

Mycobacterium tuberculosis is best demonstrated by_________________?

Correct answer: C. Ziehl-Neelsen stain

  • A. Gram's stain
  • B. H & E stain
  • C. Ziehl-Neelsen stain
  • D. PAS stain

Explanation

Mycobacterium tuberculosis has a lipid-rich, waxy cell wall that resists ordinary staining and is demonstrated by the acid-fast Ziehl-Neelsen stain. Gram stain is unreliable for showing it clearly.

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