No growth around the "A" disk can be used to identify Streptococcus pyogenes.What substance is in the "A" disk?
A) Vancomycin
B) Penicillin
C) Tetracycline
D) Bacitracin

Question

Quizplus · Accepted Answer

The substance in the "A" disk is bacitracin. No growth around the bacitracin disk can be used to identify Streptococcus pyogenes, as this bacterial species is sensitive to bacitracin. Vancomycin, penicillin, and tetracycline are not typically used for identifying Streptococcus pyogenes.

No Growth Around the "A" Disk Can Be Used to Identify