KROK 1 2018 – Question 121 · KROK (Medicine) · Microbiology, Virology, and Immunology

During the skill-building session in microbiology the students need to stain the prepared and fixed sputum smears obtained from a tuberculosis patient. What staining technique should be used in this case?

  1. A. Gram
  2. B. Giemsa
  3. C. Ziehl-Neelsen
  4. D. Gins
  5. E. Burry
Hint

Consider what feature of the mycobacterial cell wall defeats ordinary dyes and what special property of the organism the chosen stain must reveal.

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