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  • 04-01-2024
  • Biology
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Pathogenic streptococci of the upper respiratory tract (such as Streptococcus pyogenes) are distinguished from non-pathogenic streptococci by
A) the absece of a capsule
B) beta hemolytic activity
C) the presence of a lysogenic phage
D) no hemolytic activity
E) alpha hemolytic activity

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