CD79A and type 1 diabetes mellitus: We assessed binding to different antigenic proteins from B. adolescentis DSM 20083, B. adolescentis DSM 20086, and B. longum DSM 20088 by IgG, IgA, and IgM class antibodies and observed that IgA bound significantly more B. adolescentis DSM 20083 strain antigens in children who developed islet autoimmunity and T1D later in life.