Fig. 2

High titer IgG anti-A hemolysins mediated monocyte erythrophagocytosis. a–e No significant phagocytosis was observed when Group A1 + RBCs were coated with high titer IgG anti-A hemolysin only. f, j No significant increase in phagocytosis was observed when Group A1 + RBCs were coated with high titer IgG anti-A hemolysin H1 (f), H2 (f), and H5 (j) and fresh Group A serum as a source of complement. A significant increase in phagocytosis was observed upon complement C3b activation for hemolysin H3 (17.01%; h) and H4 (41.8%; i). Fresh Group A sera was used as a source of complement. RBCs: red blood cells