CD79A and bacterial infectious disease: The few studies of IgA- versus IgG-mediated ADCP in bacterial infections have shown that monomeric IgA tends to protect humanised FcαRI/CD89 mice better against multidrug-resistant Mycobacterium tuberculosis infections than IgG, while polymeric IgA and its switched isotype IgG induce Neisseria meningitides phagocytosis in a similar manner (33, 99).