Which of the following is NOT the virulent factor, an important antigenic property of S. pyogenes?
A.Endotoxins
B.Streptolysin
C.Streptokinase
D.M protein
Answer:A
Which of the following is NOT the virulent factor, an important antigenic property of S. pyogenes?
A.Endotoxins B.Streptolysin C.Streptokinase D.M protein