Gram Positive Cocci
Which toxin is inactivated on exposure to air:
|D||None of the above|
a. Streptolysin O is an oxygen labile hemolysin produced by S. pyogenes.
b. It is active only in the reduced state, i.e under anaerobic conditions or in pour plate cultures.
c. It is antigenic and ASO titer is used for the retrospective diagnosis of streptococcal infections.
d. Streptolysin S is responsible for hemolysis around surface colonies of S. Pyogenes. In contrast it is non-antigenic