Streptococcus Pyogens: Morphology

Streptococcus Pyogens: Morphology,Transmission, Antigenicity and Lysogeny

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Streptococcus Pyogens: Morphology,Transmission, Antigenicity and Lysogeny MORPHOLOGY Group A streptococci Gram-positive cocci Arranged in chains.  Cultural characteristics Virulent strains produce ‘matt’ (finely granular) colony Avirulent strains produce ‘glossy’ colonies. Capsulated strains produce mucoid colonies, corresponding in virulence to the matt type. Biochemical reactions Senstivity to bacitracin. (Maxted’s observation). Catalase negative (S aureus is Catalase Positive) CAMP […]

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Streptococcus Pyogens: Morphology,Transmission, Antigenicity and Lysogeny

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Streptococcus Pyogens: Morphology,Transmission, Antigenicity and Lysogeny Q. 1 Staphylococcus aureus and Streptococcus pyogenes are SIMILAR in all of the following features EXCEPT one. Pick the INCORRECT statement:  A Both produce numerous exotoxins and exoenzymes  B Both are Gram-positive cocci  C Both cause skin, tissue, and systemic infections  D Both are catalase positive Q. 1 Staphylococcus

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