Test for differentiating virulent form non-virulent tubercular bacilli_____________?
Correct answer: C. Neutral red test
- A. Aryl sulphatase test
- B. Niacin test
- C. Neutral red test
- D. Catalase peroxidase test
Explanation
The neutral red test helps distinguish virulent from avirulent tubercle bacilli because virulent strains produce a characteristic uptake or colour reaction. The niacin test is mainly used to identify Mycobacterium tuberculosis among mycobacteria.
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