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<p>Heat stress (HS) compromises broiler productivity by depressing growth, meat quality, and physiological resilience. This trial evaluated the effects of a novel multi-strain probiotic solution, RISCO NUTRIFOUR (MSPS), in 288 Ross 308 broilers reared under standard environmental temperatures until day 28, followed by exposure to cyclic HS (35 ± 1<sup>°</sup>C, 09:00–17:00; 23 ± 1<sup>°</sup>C thereafter) until day 42. Birds were randomly allotted to six dietary treatments within the basal diet: MSPS at 1, 2, or 4 mL kg<sup>-¹</sup>; <i>Bacillus subtilis</i> (1 mL kg<sup>-¹</sup>); <i>S. cerevisiae</i> (1 mL kg<sup>-¹</sup>); or an unsupplemented control (<i>n</i> = 8 pens * 6 birds). At day 42, breast meat quality and carcass characteristics of heat-stressed broilers were assessed. Also, the performance index (PI), European production efficiency factor (EPEF), and feed efficiency (FE) of the production cycle were calculated. MSPS at 1 mL kg<sup>-¹</sup> significantly (<i>p</i> &lt; 0.05) enhanced PI (+ 18.5%), EPEF (+ 18.2%), and FE (+ 13.6%) <i>versus</i> the negative control. Also, cooking loss percentage fell by 40.5% and breast meat lightness (L<sup>*</sup>) and whiteness index increased (<i>p</i> &lt; 0.05). MSPS improved ultimate pH and reduced core temperature 24&#xa0;h post-mortem, indicating better metabolic recovery. No adverse effects on relative internal organ weights, texture, or sensory traits were noted (<i>p</i> &gt; 0.05). GC-MS revealed that MSPS has antioxidant and antimicrobial metabolites that may underpin these responses. In conclusion, MSPS, particularly at 1 mL kg<sup>-¹</sup>, mitigates HS-induced detriments to meat quality and growth, resulting in improved PI, EPEF, and FE, offering a practical antibiotic-free strategy for the broiler industry in hot climates.</p>

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Dietary RISCO NUTRIFOUR multistrain multikingdom probiotic consortia improves meat quality carcass traits and growth efficiency in heat stressed broilers

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月3日

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  • Abdulaziz A. Al-abdullatif,
  • Maged A. Al-Garadi,
  • Mohammed M. Qaid,
  • Abdulkareem M. Matar,
  • Mohsen M. Alobre,
  • Mohammed A. Al-Badwi,
  • Gamaleldin M. Suliman,
  • Elsayed O. Hussein

摘要

Heat stress (HS) compromises broiler productivity by depressing growth, meat quality, and physiological resilience. This trial evaluated the effects of a novel multi-strain probiotic solution, RISCO NUTRIFOUR (MSPS), in 288 Ross 308 broilers reared under standard environmental temperatures until day 28, followed by exposure to cyclic HS (35 ± 1°C, 09:00–17:00; 23 ± 1°C thereafter) until day 42. Birds were randomly allotted to six dietary treatments within the basal diet: MSPS at 1, 2, or 4 mL kg-¹; Bacillus subtilis (1 mL kg-¹); S. cerevisiae (1 mL kg-¹); or an unsupplemented control (n = 8 pens * 6 birds). At day 42, breast meat quality and carcass characteristics of heat-stressed broilers were assessed. Also, the performance index (PI), European production efficiency factor (EPEF), and feed efficiency (FE) of the production cycle were calculated. MSPS at 1 mL kg-¹ significantly (p < 0.05) enhanced PI (+ 18.5%), EPEF (+ 18.2%), and FE (+ 13.6%) versus the negative control. Also, cooking loss percentage fell by 40.5% and breast meat lightness (L*) and whiteness index increased (p < 0.05). MSPS improved ultimate pH and reduced core temperature 24 h post-mortem, indicating better metabolic recovery. No adverse effects on relative internal organ weights, texture, or sensory traits were noted (p > 0.05). GC-MS revealed that MSPS has antioxidant and antimicrobial metabolites that may underpin these responses. In conclusion, MSPS, particularly at 1 mL kg-¹, mitigates HS-induced detriments to meat quality and growth, resulting in improved PI, EPEF, and FE, offering a practical antibiotic-free strategy for the broiler industry in hot climates.