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<p>This study investigated whether dietary supplementation with <i>Bacillus amyloliquefaciens</i> and <i>B. licheniformis</i>, either individually or in combination, could enhance growth performance and physiological parameters in broiler chickens. Four hundred 1-day-old male Ross 308 chicks were randomly allocated to four treatment groups (<i>n</i> = 100 per group): control (basal diet), <i>B. amyloliquefaciens</i> (100&#xa0;g/ton), <i>B. licheniformis</i> (100&#xa0;g/ton), or combined supplementation (100&#xa0;g/ton each species). Birds received experimental diets for 35 days. All probiotic treatments improved body weight gain and feed conversion ratio compared to controls. Notably, the combined supplementation produced synergistic effects, yielding significantly greater improvements in body weight gain, feed efficiency, and breast muscle weight than either probiotic alone. Protein digestibility was enhanced by all treatments, while fat digestibility improved with <i>B. licheniformis</i> and the combination. The probiotic supplements significantly increased plasma antioxidant enzyme activities (glutathione peroxidase, catalase, and superoxide dismutase) while reducing malondialdehyde concentrations. All treatments decreased plasma total cholesterol and low-density lipoprotein levels while increasing high-density lipoprotein concentrations. Abdominal fat deposition was significantly reduced across all probiotic groups. These findings demonstrate that combined <i>B. amyloliquefaciens</i> and <i>B. licheniformis</i> supplementation synergistically improves broiler performance through enhanced nutrient utilization and reduced oxidative stress.</p>

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Combined Bacillus Amyloliquefaciens and Bacillus Licheniformis for Preventive Health Management: Effects on Growth Performance, Intestinal Integrity, and Oxidative Status in Broilers Under Controlled Housing

  • 期刊论文

  • 发表日期：

    2026年3月18日

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  • Ahmed Ali Saleh,
  • Mahmoud M. Aboud,
  • Neamat Badwi,
  • Mohammed A. Kamal,
  • Elsayed Osman Hussein,
  • Branislav Galik,
  • Hana Hakami,
  • Ahmed Sami,
  • Abeer A. Kirrella

摘要

This study investigated whether dietary supplementation with Bacillus amyloliquefaciens and B. licheniformis, either individually or in combination, could enhance growth performance and physiological parameters in broiler chickens. Four hundred 1-day-old male Ross 308 chicks were randomly allocated to four treatment groups (n = 100 per group): control (basal diet), B. amyloliquefaciens (100 g/ton), B. licheniformis (100 g/ton), or combined supplementation (100 g/ton each species). Birds received experimental diets for 35 days. All probiotic treatments improved body weight gain and feed conversion ratio compared to controls. Notably, the combined supplementation produced synergistic effects, yielding significantly greater improvements in body weight gain, feed efficiency, and breast muscle weight than either probiotic alone. Protein digestibility was enhanced by all treatments, while fat digestibility improved with B. licheniformis and the combination. The probiotic supplements significantly increased plasma antioxidant enzyme activities (glutathione peroxidase, catalase, and superoxide dismutase) while reducing malondialdehyde concentrations. All treatments decreased plasma total cholesterol and low-density lipoprotein levels while increasing high-density lipoprotein concentrations. Abdominal fat deposition was significantly reduced across all probiotic groups. These findings demonstrate that combined B. amyloliquefaciens and B. licheniformis supplementation synergistically improves broiler performance through enhanced nutrient utilization and reduced oxidative stress.