Acid-fast staining is used to identify bacteria such as which genus?

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Study for the VTNE Laboratory Procedures Test. Use flashcards and multiple choice questions, each question offers hints and explanations, enabling increased understanding and retention. Prepare effectively for your exam!

Multiple Choice

Acid-fast staining is used to identify bacteria such as which genus?

Explanation:
Acid-fast staining is used for organisms with waxy, lipid-rich cell walls containing mycolic acids that trap the primary stain and resist decolorization. This makes these bacteria appear bright red or pink after staining. Mycobacterium tuberculosis is a classic example because its mycolic acid–rich wall retains the stain, helping identify TB organisms in specimens. The other listed bacteria lack this waxy wall and will not retain the acid-fast stain, so they don’t appear acid-fast and are typically identified by other staining methods. In practice, acid-fast stains are a rapid screen for mycobacterial infections like tuberculosis.

Acid-fast staining is used for organisms with waxy, lipid-rich cell walls containing mycolic acids that trap the primary stain and resist decolorization. This makes these bacteria appear bright red or pink after staining. Mycobacterium tuberculosis is a classic example because its mycolic acid–rich wall retains the stain, helping identify TB organisms in specimens. The other listed bacteria lack this waxy wall and will not retain the acid-fast stain, so they don’t appear acid-fast and are typically identified by other staining methods. In practice, acid-fast stains are a rapid screen for mycobacterial infections like tuberculosis.

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