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Electron micrograph images of the ileum (A) and jejunum (B) tissues from broiler treatments. CON, chicks were fed a corn- and soybean-based diet; ZnB, chicks were fed basal diet containing 500 mg ZnB/kg; BS-1, chicks were fed basal diet containing 1 × 108 CFU/g feed of BS-ATCC19659; BS-3, chicks were fed basal diet containing 3 × 108 CFU/g feed of BS-ATCC19659; BS-5, chicks were fed basal diet containing 5 × 108 CFU/g feed of BS-ATCC19659.
