Lactobacillus fermentum supplementation modulates jejunal microbiota, metabolome, and morphology in yaks under high-energy feeding.

Compared with the Con group, the relative abundance of Firmicutes in the ME and HE groups showed a gradual increasing trend, while the relative abundance of Bacteroidetes showed a decreasing trend, indicating that energy intake level significantly affects the balance between these two major bacterial phyla.

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In this study, vadinBE97 showed a highly significant positive correlation with propionate, which is a key precursor of the TCA cycle and directly participates in host energy metabolism pathways.

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