In addition to previous research, considering the essential role played by intestinal DC subsets in the inhibition or prevention of food allergy (44) and the significant correlation with Mollicutes_RF39 and Clostridiales, we may infer that OVA sensitization decreased the intestinal richness of Mollicutes_RF39 and Clostridiales, which may induce Treg proliferation through CD103+CD80+ DC subsets in MLN. Here, CD80 is linked to food allergy.