Interactions of streptococci with human colostral immunoglobulin A☆

The structure and function of human IgA

“…One mechanism utilized by some streptococci involves a cellsurface receptor which recognizes the Fc region of IgA. This receptor, found on group A strains of certain M types, plays an important role as a virulence factor for these micro-organisms because of its anti-phagocytic activity [88,89]. The IgA receptor is found together with IgG receptors on some strains but others express only receptors for IgA.…”