The designation "group A," used to help classify Streptococcus pyogenes, refers to this bacterium's

Question

Quizplus · Accepted Answer

The designation "group A" refers to the Lancefield antigen, which is a carbohydrate antigen found on the cell wall of Streptococcus pyogenes. This antigen is used to help classify different strains of the bacterium.

Answer: C
 The M protein is a virulence factor found on the surface of Streptococcus pyogenes, and it is a major component of the Lancefield group A antigen. The different forms of the M protein can be used to further classify strains of the bacterium.

Therefore, the best choices are A and C.

The Designation "Group A," Used to Help Classify Streptococcus Pyogenes