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Dietary administration of Bacillus subtilis KC1 improves growth performance, immune response, heat stress tolerance, and disease resistance of broiler chickens
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DOI：10.1016/j.psj.2021.101693.png)
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Abstract
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The purpose of the present study was to evaluate the probiotic properties of Bacillus subtilis KC1 as a feed additive in the poultry feed. Effects of the Bacillus subtilis supplementation on growth performance, heat-stress tolerance, resistance to Mycoplasma gallisepticum (MG) and Salmonella Pullorum challenge of broilers were determined. The protective effects of the Bacillus subtilis on liver function and immune response of broilers challenged with Aflatoxin B1 (AFB1) were also scrutinized. The results showed that the Bacillus subtilis supplementation could improve growth performance, increased body weight, relative weight of the immune organ and dressing percentage, and decrease feed conversion ratio. In addition, the Bacillus subtilis supplementation alleviated adverse effects caused by heat stress, MG, and Salmonella Pullorum challenge. Furthermore, the Bacillus subtilis supplementation resulted in improved liver function and enhanced immune response of broilers challenged with AFB1. In conclusion, these results suggested a tremendous potential of Bacillus subtilis KC1 as a feed additive in the poultry feed.
Keywords:
Bacillus subtilis
Salmonella Pullorum
Mycoplasma gallisepticum
heat stress
Aflatoxin B1
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