OCA2 and tuberculosis: These data are in accordance with other studies, such as that by Armstrong et al, who demonstrated that rabbit tuberculosis-immune sera opsonize M. tuberculosis and promote macrophage phagocytosis, as well as P-L fusion [41]; that by Kang et al, who showed that entry of ManLAM beads into macrophages via mannose receptors inhibited P-L fusion while entry of anti-LAM mAb coated beads via FcɣRs did not [42]; and that by Kumar et al, who recently demonstrated that human natural opsonizing Abs promote phagosome maturation and restrict M. tuberculosis survival in human macrophages [43].