QUESTION 8
Case study:
A patient is suspected to have contracted tuberculosis (Mycobacterium tuberculosis). A collegue suggests doing a Gram stain to confirm whether or not it is tuberculosis. Which of the following would be a correct response?
A negative Gram stain would confirm the diagnosis.
Gram stains cannot confirm tuberculosis because that organism may be resistant to normal stains.
Mycobacteria do not have cell walls and cannot be stained at all.
A positive Gram stain would confirm the diagnosis.

Question

Accepted Answer

***B*** ∻Key Concept∻ ⚹Gram stain limitations for Mycobacterium tuberculosis⚹ ∻Explanation∻ ⚹Mycobacterium tuberculosis has a waxy cell wall due to the presence of mycolic acids, which makes it resistant to Gram staining. Instead, acid-fast staining is required to visualize these bacteria.⚹◊What is the primary difference between the staining properties of Mycobacterium tuberculosis and typical bacteria in a Gram stain test?⍭ Generate me a similar question◊

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