MUC5AC and type 1 diabetes mellitus: Finally, our data indicate that 1) reduced diversity of gut microbiome, 2) reduced abundance of non-pathogenic mucin-degrading species, 3) reduced butyrate-producing members, 4) reduced Firmicutes-to-Bacteroides ratio, and 5) decreased relative abundance of lactate-producing bacteria may be all parameters able to identify a gut dysbiosis situation in T1D patients.