CD79A and Cowden disease: We found that fecal microbiota contained 22.86 ± 12.23% of IgA-coated bacteria, 11.13 ± 8.74% IgG-coated bacteria, and 6.81 ± 6.72% of IgA/IgG-coated bacteria, respectively, in CD patients, and 22.53 ± 13.83% of IgA-coated bacteria, 11.43 ± 11.07% of IgG-coated bacteria, and 6.68 ± 6.27% of IgA/IgG-coated bacteria, respectively, in UC patients.