Lancefield classifiction of Streptococcus is based on: (A) M protein, (B) Carbohydrate C antigen of cell wall, (C) Hemolysis, (D) Bile solubility
Answer is B. Based on oxygen requirement - aerobic/ ananerobic Brown's classification -Based on haemolysis on blood agar (alpha, beta, gamma) Streptococci maybe classified based on carbohydrate C antigen of cell wall into Lancefield groups (A-W ecxcluding I, J) M protein types classified into Griffith types