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Abstract

This study evaluated the effects of Bacillus subtilis, Saccharomyces boulardii, oregano, and calcium montmorillonite on the physical growth, intestinal histomorphology, and blood metabolites in Salmonella-challenged birds during the finisher phase. In this study, a total of 600 chicks (Ross 308) were randomly distributed into the following dietary treatments: basal diet with no treatment; infected with Salmonella; T1, infected + avilamycin; T2, infected + Bacillus subtilis; T3, Saccharomyces boulardii; T4, infected + oregano; T5, infected + calcium montmorillonite. Our results indicated that feed consumption, body weight gain, total body weight, and feed conversion ratio increased significantly (P < 0.01) in T1 and T2. Villus width increased significantly (P < 0.01) in T1 while the total area was significantly (P < 0.01) higher in T1 and T2 among the treatment groups. Blood protein was significantly (P < 0.01) high in T3 and T4; however, the glucose concentration was significantly (P < 0.01) high in T2, T3, and T4. The treatments increased significantly (P< 0.01) in the treatment groups compared to the negative control. Aspirate aminotransferase (AST) was significantly (P < 0.05) low in T3 compared to the positive control. In conclusion, the results indicated that supplementation of Bacillus subtilis and calcium montmorillonite improved the production performance compared to other feed additives in broiler chicks infected with Salmonella during the finisher phase.

Keywords: Chickens; biochemical; growth; intestine; probiotic.

Research Insights

SupplementHealth OutcomeEffect TypeEffect Size
Bacillus SubtilisImproved Intestinal HistomorphologyBeneficial
Large
Bacillus SubtilisIncreased Blood Glucose LevelsNeutral
Moderate
Bacillus subtilis AB22Improved Intestinal FunctionBeneficial
Moderate
Bacillus subtilis AB22Increased Blood Glucose LevelsNeutral
Moderate
Bacillus subtilis DE11Improved Production PerformanceBeneficial
Large
Bacillus subtilis DE11Increased Blood Glucose LevelsNeutral
Moderate
Bacillus subtilis DE11Increased Villus Surface AreaBeneficial
Large
Bacillus subtilis DE111Improved Production Performance in Salmonella-Infected Broiler ChicksBeneficial
Large
Bacillus subtilis DE111Increased Blood Protein LevelsBeneficial
Large
Bacillus subtilis DE111Reduced Aspartate Aminotransferase LevelsBeneficial
Moderate
Bacillus subtilis HU58Improved Blood Glucose ConcentrationBeneficial
Moderate
Bacillus subtilis HU58Improved Gastrointestinal HealthBeneficial
Moderate
Bacillus subtilis HU58Improved Growth PerformanceBeneficial
Large
Bacillus subtilis SNZ-1972Improved Growth PerformanceBeneficial
Large
Bacillus subtilis SNZ-1972Improved Intestinal FunctionBeneficial
Moderate
Bacillus subtilis SNZ-1972Increased Blood Glucose LevelsNeutral
Moderate

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