Which of the following stains is generally used for the diagnosis of tuberculosis?
A)Acid-fast stain
B)Gram stain
C)Negative stain
D)Simple stain

Question

Quizplus · Accepted Answer

Acid-fast stain is used for the diagnosis of tuberculosis. The acid-fast staining technique is based on the property of mycobacterial cell walls to retain carbol fuchsin (a dye) in the presence of acid and alcohol, whereas other microorganisms lose the dye. Hence, acid-fast staining helps in the identification of acid-fast bacilli (AFB) that are responsible for tuberculosis. Gram stain is not used for the diagnosis of tuberculosis as mycobacteria are resistant to this technique. Negative stain and simple stain are not commonly used for the diagnosis of tuberculosis.

Which of the Following Stains Is Generally Used for the Diagnosis