C-Carbohydrate in Streptococcus hemolyticus is important for:: (A) Lancefield classification, (B) Phagocytic inhibition, (C) Toxin production, (D) Haemolysis
Answer is A. Ans. is 'a' i.e Lancefield classification Hemolytic Streptococci were classified by Lancefield, serologically into groups based on the nature of carbohydrate C antigen on the cell wallThese are known as Lancefield groups. Twenty of these have been classified from A-V without I and J.The other component of the streptococcal cell wall that are antigenic areM-Protein -It is the major virulence factor for the group A streptococcus. It inhibitsActivation of complementsPhagocytosis of the organism.Group A Streptococcus are further classified on the basis of M-protein. (approx. 80 serotypes based on M protein)T -Protein - No relation to virulenceR -Protein - No relation to virulence.