Multiple choice

Which of the following staining methods use(s) carbol fuchsin and methylene blue as primary stain and counter stain?

P. Gram stain Q. Kinyoun stain R. Ziehl–Neelsen stain

  1. Only P

  2. Only Q

  3. Only R

  4. P and Q

  5. Q and R
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

The reagents used in Ziehl–Neelsen staining method are carbol fuchsin (primary stain), acid alcohol and methylene blue (counter stain). The Kinyoun staining method uses carbol fuchsin as a primary stain, followed by decolourization with an acid-alcohol solution and methylene blue as a counter stain.

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