improves intestinal barrier, antioxidant capacity and gut microbial composition in AA broiler.

can secret a variety of substances to improve human and animal gut health inhibiting the proliferation of pathogenic bacteria. In this study, a fast-growing and stress-resistant strain of () were isolated, which showed a strong antibacterial activity to K88, ATCC14028, and ATCC25923 . studies showed that can significantly improve the average daily gain (ADG) using an AA broiler model. Dietary improved the intestinal morphology. The villus height of jejunum and ileum were significantly increased. The concentration of malondialdehyde (MDA) in the ileal mucosa was significantly reduced in treatment group, which suggested the oxidative stress of the ileum was significantly relieved. Though the β diversity of treatments was not significantly, improved the composition of intestinal microbes, especially at the level of caecum genus, the dominant genus was changed from to , which indicated the change of intestinal carbohydrate nutrition. In conclusion, these data indicate that the M6 shows a probiotic potential to improve intestinal health altering gut microbiota.