False about Streptococcus pyogenes
A convenient method for the identification of S.pyogenes is based on Maxted's observation that they are more sensitive to bacitracin than other streptococci. a filter paper disc of 0.04 U is applied on the surface of an inoculated blood agar. After incubation, a wide zone of inhibition is seen with S.pyogenes, but not with other streptococci. Ref: Textbook of microbiology; Ananthanarayan and paniker's; 10th edition; Pg:217, 218
Causes necrotizing fasciitis
Beta haemolytic
M protein is the virulence factor
Resistant to bacitracin
Bacteriology