A beta-hemolytic gram positive coccus in chains from a throat culture is susceptible to bacitracin and is PYR …

Question

A beta-hemolytic gram positive coccus in chains from a throat culture is susceptible to bacitracin and is PYR positive. Which organism is most likely?

Accepted Answer

보기 4: Streptococcus pyogenes

Among the beta-hemolytic streptococci, susceptibility to bacitracin combined with a positive PYR reaction is characteristic of Streptococcus pyogenes. Streptococcus agalactiae is bacitracin resistant and is identified with the CAMP test, and enterococci are PYR positive but differ in hemolysis and specimen source.

Answer

보기 1: Streptococcus agalactiae

Answer

보기 2: Enterococcus faecalis

Answer

보기 3: Streptococcus pneumoniae

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A beta-hemolytic gram positive coccus in chains from a throat culture is susceptible to bacitracin and is PYR positive. Which organism is most likely?

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