Identify the organism on Bacitracin sensitivity disk test given below?
Ans. A. Streptococcus pyogenes
- Bacitracin test is used to determine the effect of a small amount of bacitracin (0.04 IU or 0.05 IU not higher) on an organism.
- Streptococcus pyogenes (Group A Streptococci/ is inhibited by the small amount of bacitracin in the disk; other beta-hemolytic streptococci usually are not.