A cerebrospinal fluid of a 2 years old child has been sent to the laboratory to detect the presence of capsulated yeast. The staining technique most commonly employed for the purpose is______________?
Correct answer: A. India ink preparation
- A. India ink preparation
- B. Methanamine silver stain
- C. Ziehl-Neelsen stain
- D. Pyte-ferraco stain
Explanation
India ink provides a dark background against which the unstained capsule of Cryptococcus appears as a clear halo. It is the classic direct test for capsulated yeast in cerebrospinal fluid.
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