The Protein Produced by S

Question

The protein produced by S. aureus that interferes with phagocytosis is
A)protein M.
B)collagen.
C)protein A
D)capsular protein.

Accepted Answer

The protein produced by S. aureus that interferes with phagocytosis is protein A. It binds to IgG antibodies in a way that prevents them from being recognized and bound by phagocytic cells, thus inhibiting phagocytosis. Protein M is a virulence factor produced by Streptococcus pyogenes that has a similar function, but it is not produced by S. aureus. Collagen and capsular protein are not known to interfere with phagocytosis.