highly significantP < 0.01
We then assessed the relationship between the dominant genera and SCFAs in the gut microbes using Spearman’s coefficient and found that Megasphaera showed a highly significant positive correlation with AA ( P < 0.01), Clostridium_sensu_stricto showed a highly significant positive correlation with PA ( P < 0.01), and Collinsella and Clostridium_XVIII showed a significant positive correlation with BA ( P < 0.5). sIgA is a common antibody of the human immune system, and sIgA antibodies offer an immune defense against benign bacteria found in the intestinal flora that would otherwise have negative consequences on the health of the organism.