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* Streptococcus pyogenes
 #852102  
  adair - 06/12/18 16:41
 
  A 5-year old boy has a fever, exudative pharyngitis and cervical lymphadenopathy. His pediatrician suspects that the cause is Strep. pyogenes. Which of the following findings would be most useful for diagnosis an infection caused by this organism?

A- beta hemolysis in blood agar

B- large yellow colony on blood agar

C- No production of catalase

D- susceptibility to bacitracin

E- susceptibility to hypertonic salt
 
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* Re:Streptococcus pyogenes
#3368072
  halux - 06/12/18 16:59
 
  D- susceptibility to bacitracin

is the most specific answer here...
 
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