CD79A and infection: Gut microbiota is also involved in the digestion of energy substrates, production of vitamins and hormones [21], protection from pathogenic bacteria by consuming nutrients and producing molecules that inhibit their growth [22-24], production of nutrients for mucosal cells [25-27], augmenting total and pathogen-specific mucosal IgA levels upon infection [28,29], and in modulating immune system development and immunological tolerance [30].