Streptococcus pyogenes
Streptococcus Pyogenes Morphology Group A streptococci Gram-positive cocci Arranged in chains. Biochemical Characterstics Senstivity to bacitracin. (Maxted’s observation). Catalase negative (S aureus is Catalase Positive) CAMP Negative (Group B Streptococci are CAMP Positive) Not soluble in 10% bile. Hydrolyse PYR (Used for Presumptive Diagnosis of S pyogenes) Ferment trehalose but not ribose. Cultural Characteristics Virulent […]
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