Question

A culture of Mycobacterium leprae was subjected to alkaline ethanol extraction prior to acid-fast staining. The colour of the culture following staining will be

• A. Red
• B. Green
• C. Yellow
• D. Blue

Answer 1

The correct option is A Red

A culture of Mycobacterium leprae was subjected to alkaline ethanol extraction prior to acid-fast staining. The colour of the culture following staining will be red because it is an acid-fast bacteria as it contains a large amount of lipoidal material in their cell wall which prevents penetration of decolorizing solution.

So, the correct answer is 'Red'.