Longhuan Du

Abstract While the gut microbiota is recognized as a key modulator of host immunity, its age-related dynamics in adult-to-senescent broilers remain poorly characterized. This study aimed to comprehensively analyze age- and sex-related variations in serum immune indices and gut microbiota composition in yellow-feathered broilers aged 1 to 4 years (n = 40). Peripheral blood and fecal samples were gathered for immune profiling using ELISA (STP, IgA, IgG, IL-4, IFN-γ) and 16S rDNA sequencing.

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