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Understanding the effects of intramuscular injection and feed withdrawal on Salmonella Typhimurium shedding and gut microbiota in pullets

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Journal of Animal Science and Biotechnology 2022年第1期13卷 123-137页

作者： Nitish Narendra Joat Samiullah Khan Kapil Chousalkar School of Animal and Veterinary Sciences The University of AdelaideRoseworthySouth Australia 5371Australia

Background:Gut microbiota plays a key role in health,immunity,digestion,and production in *** such as environment,diet,diseases,stress,and flock management significantly affect gut microbiota;however,it is not known how potential stressors such as intramuscular injections or feed withdrawal alter the composition of gut microbiota that result in increased the shedding level of foodborne *** the current study,the effects of intramuscular corticosterone injection and feed withdrawal were evaluated to understand their role in Salmonella Typhimurium shedding and changes in the composition of gut microbiota in ***:Salmonella shedding was observed for 8 weeks *** was a significant increase in Salmonella Typhimurium count after intramuscular injection and feed *** Salmonella infected and the negative control groups showed significant differences in the abundance of different genera in gut microbiota at week 1 and up to week 7 post *** infected group showed a significant reduction in alpha diversity of gut *** reduced significantly(Pinjection,while the feed withdrawal groups did not cause any significant changes in Proteobacteria-Firmicutes ***,intramuscular injection resulted in a significant change in alpha diversity of gut ***:Exposure of chicks to relatively low dose of Salmonella Typhimurium can lead to persistent shedding in *** Salmonella Typhimurium infection disrupted the gut microbiota composition immediately after *** potential stress of intramuscular injection and feed withdrawal significantly increased the Salmonella Typhimurium count in *** intramuscular injection also resulted in a significant alteration of the Proteobacteria-Firmicutes ratio,which could increase the risk of dysbiosis.

关键词： corticosterone injection Feed withdrawal stress Gut microbiota composition Layer chicken Salmonella Typhimurium infection

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