Effects of Dietary Supplementation with Prebiotic and Bioactive Peptides Derived from Bacillus subtilis Fermentation on Performance, Immunity, Gut Health and Nutrient Digestibility in Broiler Chickens

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ABSTRACT The aim of this study was to assess the effect of in-feed antibiotic (enramycin), prebiotic (Actigen®+XOS), and bioactive peptides (BPs, Lassotide+®) derived from Bacillus subtilis fermentation on broiler performance, immune response, gut health, and nutrient utilization. A total of 900 male broiler chicks (Ross-308) were acquired and randomly allocated into six feeding treatments: (1) Control, fed with basal diet; (2) Antibiotic; basal diet + enramycin at 200g/ton in starter and grower phases; (3) Pre; basal diet + prebiotic at 400g/kg in both starter and grower phases; (4) L2SF; basal diet + BPs at 200g/ton in both starter and grower phase; (5) L2S, basal diet with BPs at 200g/ton only in the starter phase (6) L2F; basal diet supplemented with BPs at 200g/ton exclusively in the grower phase. The results indicated that body weight gain was significantly higher (p≤0.05) in the L2SF group as compared to the control during the overall period. Correspondingly, L2SF showed superior (p≤0.05) nutrient utilization, feed conversion ratio, and carcass traits as compared to the control group. The birds in the L2SF group showed notably (p≤0.05) diminished levels of pathogenic bacteria in comparison to the control. Moreover, the antibody titer and the weight of the immune organs were considerably (p≤0.05) greater in L2SF as compared to the control group. The findings of the present study demonstrate that the inclusion of BPs (Lassotide+®) at 200g/t in both starter and grower phases can successfully replace antibiotics and possess equivalent or better potential compared to prebiotics.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.