CD79A and Crohn disease: Research has demonstrated that such bacteria can influence intestinal Th17 cells and immunoglobulin A (IgA), penetrating the intestinal mucus layer to closely associate with host cells without invading, thereby playing a role in the treatment of ulcerative colitis (UC) and Crohn’s disease (CD) (Chung et al., 2012; Hedblom et al., 2018; Peng et al., 2023).