Multiple choice

Which two organisms can be distinguished by using the antibiotic bacitracin?

  1. S. pyogenes from other beta hemolytic bacteria

  2. S. pyogenes from S. pneumoniae

  3. S. aureus from S. epidermis

  4. S. pyogenes from S. aureus

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bacitracin is used to distinguish S. pyogenes from other β-hemolytic streptococci because S. pyogenes is sensitive to bacitracin and other beta hemolytic bacteria are resistant.