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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