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  • Title: Fermented soybean meal ameliorates Salmonella Typhimurium infection in young broiler chickens.
    Author: Jazi V, Mohebodini H, Ashayerizadeh A, Shabani A, Barekatain R.
    Journal: Poult Sci; 2019 Nov 01; 98(11):5648-5660. PubMed ID: 31247644.
    Abstract:
    The present study was designed to investigate the effectiveness of dietary fermented soybean meal (FSBM) in comparison with prebiotic (Xylooligosaccharide; XOS) and probiotic (Lactic acid bacteria-based probiotic; LAC) for prevention of Salmonella Typhimurium (ST) infection in young broiler chickens from 1 to 24 d. The in vitro study revealed that soybean meal (SBM) fermentation increased the number of lactic acid bacteria (LAB) and lactic acid content and inhibited the growth of enterobacteria such as coliforms in SBM. A total of 450 day-old Ross 308 broiler chicks were placed in 30 pens (15 birds/pen) and allocated to 5 experimental treatments that consisted an un-supplemented basal diet and not infected (NC) or infected with ST (IC); IC plus 2 g XOS/kg; IC plus 0.2 g LAC/kg; and IC containing a complete replacement of SBM with FSBM. All birds (except NC) were orally administered with 0.5 mL of the ST solution (1 × 106 CFU/mL) at d 3 post-hatch. The ST challenge decreased body weight gain and feed intake (P < 0.05). The impairment of feed conversion ratio was alleviated by the addition of XOS, LAC, and FSBM in broiler diets compared with IC birds (P < 0.05). The ST infection reduced duodenum and jejunum villus height and increased Salmonella colonization throughout the gut as well as internal organ invasion compared with NC birds (P < 0.05). However, ST-infected broilers fed the XOS, LAC, and FSBM-containing diets showed a significant decrease in gut Salmonella colonization, and internal organ invasion, an increase in LAB counts, and improvement in intestinal mucosa morphology (P < 0.05). The tested feed additives or FSBM reduced heterophil to lymphocyte ratio compared with the IC group (P < 0.05). The results suggest that XOS, LAC, and FSBM improve growth performance, lower Salmonella colonization, and improve intestinal characteristics and immune response in ST-challenged broiler chicks. Therefore, fermented feeds due to having functional ingredients can be considered as an effective strategy to lessen the colonization of gut pathogens in broiler chickens.
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