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Title: | Bacillus amyloliquefaciens CECT 5940 improves performance and gut function in broilers fed different levels of protein and/or under necrotic enteritis challenge | Contributor(s): | Gharib-Naseri, Kosar (author) ; Dorigam, Juliano C P (author); Doranalli, Kiran (author); Morgan, Natalie (author) ; Swick, Robert A (author) ; Choct, Mingan (author); Wu, Shu-Biao (author) | Publication Date: | 2021-03 | Early Online Version: | 2020-08-23 | Open Access: | Yes | DOI: | 10.1016/j.aninu.2020.05.004 | Handle Link: | https://hdl.handle.net/1959.11/30595 | Abstract: | Two studies were conducted to investigate the effect of Bacillus amyloliquefaciens CECT 5940 (BA) as a probiotic on growth performance, amino acid digestibility and bacteria population in broiler chickens under a subclinical necrotic enteritis (NE) challenge and/or fed diets with different levels of crude protein (CP). Both studies consisted of a 2 × 2 factorial arrangement of treatments with 480 Ross 308 mix-sexed broiler chickens. In study 1, treatments included 1) NE challenge (+/−), and 2) BA (1.0 × 106 CFU/g of feed) supplementation (+/−). In study 2, all birds were under NE challenge, and treatments were 1) CP level (Standard/Reduced [2% less than standard]) and 2) BA (1.0 × 106 CFU/g of feed) supplementation (+/−). After inducing NE infection, blood samples were taken on d 16 for uric acid evaluation, and cecal samples were collected for bacterial enumeration. In both studies, ileal digesta was collected on d 35 for nutrient digestibility evaluation. In study 1, the NE challenge reduced body weight gain (BWG), supressed feed conversion ratio (FCR) and serum uric acid levels (P < 0.001). Supplementation of BA increased BWG (P < 0.001) and reduced FCR (P = 0.043) across dietary treatments, regardless of challenge. Bacillus (P = 0.030) and Ruminococcus (P = 0.029) genomic DNA copy numbers and concentration of butyrate (P = 0.017) were higher in birds fed the diets supplemented with BA. In study 2, reduced protein (RCP) diets decreased BWG (P = 0.010) and uric acid levels in serum (P < 0.001). Supplementation of BA improved BWG (P = 0.001) and FCR (P = 0.005) and increased Ruminococcus numbers (P = 0.018) and butyrate concentration (P = 0.033) in the ceca, regardless of dietary CP level. Further, addition of BA reduced Clostridium perfringens numbers only in birds fed with RCP diets (P = 0.039). At d 35, BA supplemented diets showed higher apparent ileal digestibility of cystine (P = 0.013), valine (P = 0.020), and lysine (P = 0.014). In conclusion, this study suggests positive effects of BA supplementation in broiler diets via modulating gut microflora and improving nutrient uptake. | Publication Type: | Journal Article | Source of Publication: | Animal Nutrition, 7(1), p. 185-197 | Publisher: | Zhongguo Xumu Shouyi Xuehui, Chinese Association of Animal Science and Veterinary Medicine | Place of Publication: | China | ISSN: | 2405-6383 2405-6545 |
Fields of Research (FoR) 2008: | 070205 Animal Protection (Pests and Pathogens) | Fields of Research (FoR) 2020: | 300304 Animal protection (incl. pests and pathogens) | Socio-Economic Objective (SEO) 2008: | 830309 Poultry | Socio-Economic Objective (SEO) 2020: | 100411 Poultry | Peer Reviewed: | Yes | HERDC Category Description: | C1 Refereed Article in a Scholarly Journal |
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Appears in Collections: | Journal Article School of Environmental and Rural Science |
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openpublished/BacillusGharibNaseriMorganSwickChoctWu2021JournalArticle.pdf | Published version | 804.21 kB | Adobe PDF Download Adobe | View/Open |
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