Multiple choice Which two organisms can be distinguished by using the antibiotic bacitracin? S. pyogenes from other beta hemolytic bacteria S. pyogenes from S. pneumoniae S. aureus from S. epidermis 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.