Diets Supplemented with Probiotics Improve the Performance of Broilers Exposed to Heat Stress from 15 Days of Age
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Le résumé fourni par la source
Abstract The poultry sector demands alternative additives to antibiotics that can be used as performance enhancers. Therefore, this experiment was conducted to evaluate the probiotics effects on performance, intestinal health and redox status of 720 broilers exposed to heat stress from 15 days of age. Eight dietary treatments were evaluated: basal diet (BD) without antibiotic and probiotic (T1); BD supplemented with antibiotic zinc bacitracin (T2), BD supplemented with commercial probiotic of Bacillus subtilis DSM 17299 (T3); BD supplemented with non-commercial probiotic of Lactococcus lactis NCDO 2118, Lactobacillus delbrueckii CNRZ 327, Escherichia coli CEC15 or Saccharomyces boulardii (T4 to T7), and BD simultaneously supplemented with the four non-commercial probiotics (T8). Feed intake, weight gain and feed conversion were determined in the period from 1 to 42 days of age. Carcass and cuts yield, abdominal fat deposition, cloacal temperature, weight and length of intestine, activity of myeloperoxidase and eosinophilic peroxidase enzymes in the jejunum, jejunal histomorphometry, relative gene expression in the jejunum (occludin, zonulin, interleukin-8, cholecystokinin, ghrelin and heat shock protein-70) and liver (heat shock protein-70), in addition to malondialdehyde level and superoxide dismutase activity in the intestine, liver and blood were measured in broilers at 42 days old. As a main results, broilers fed T1 diet exhibited lower weight gain (3.222 kg) and worse feed conversion (1.70 kg/kg). However, diets containing non-commercial probiotics resulted in up to 3.584 kg of weight gain and improved feed conversion by up to 10%, similar to that observed for broilers of the T2 and T3 groups.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Diets Supplemented with Probiotics Improve the Performance of Broilers Exposed to Heat Stress from 15 Days of Age
- Date Crossref
- 24/08/2022
- Éditeur
- Research Square Platform LLC
- Type
- posted-content
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Universidade Federal de Lavras pays non établi dans la noticeUniversité ou école supérieure
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Federal Center for Technological Education of Minas Gerais pays non établi dans la noticeUniversité ou école supérieure
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Universidade de São Paulo pays non établi dans la noticeUniversité ou école supérieure
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Universidade Federal de Sergipe pays non établi dans la noticeUniversité ou école supérieure
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Universidade Federal de Minas Gerais pays non établi dans la noticeUniversité ou école supérieure
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Centro Federal de Educação Tecnológica de Minas Gerais pays non établi dans la noticeInstitution
Universidade Federal de Lavras, Federal Center for Technological Education of Minas Gerais et Universidade de São Paulo, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.