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Alpha-diversity (a, Chao1 index; b, Shannon index; c, Invsimpson index) comparisons in cecal microbiomes of control and B. subtilis DSM 29784-fed chickens in the grower, developer, and layer phases. Doses (CFU/kg of feed): CON (control, no probiotic), LSSB (low SSB, 1.1E+08), MSSB (medium SSB, 2.2E+08), and HSSB (high SSB, 1.1E+09).
