10 out of 22
Regarding biochemical reactions to differentiate different types of mycobacteria, all are true except:
|A||Niacin test is positive for human tubercle bacilli|
|B||Arylsulfatase test is positive in atypical mycobacteria|
|C||Neutral red test is for identifying virulent strains of tubercle bacilli|
|D||M. tuberculosis is strongly catalase positive.|
Ans. D M. tuberculosis is strongly catalase positive.
M. tuberculosis is weakly catalase positive. Other biochemicals which is gives positive are niacin test, peroxidase, neutral red test.