All are true about streptococcus Except
Mucoid colonies are due to the production of the capsule of hyaluronic acid not due to M-protein. Growth characteristic of Strep. pyogenes: On blood agar, virulent stains form matt or mucoid colonies while avirulent from glossy colonies. M, T, R are proteins found on the outer pa of the cell wall and forms the basis of Griffith classification. M protein - acts as virulence factor and antibody against it is protective. T and R protein - No relation to virulence Ref : 208
M-protein is responsible for production of mucoid colonies
M-protein is responsible for virulence
Mucoid colonies are virulent
Classified based on their haemolytic propeies.
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