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- W4295279314 abstract "A range of antibiotic alternative products is increasingly studied and manufactured in the current animal agriculture, particularly in the poultry industry. Phytogenic feed additives are known for their remarkable ability to suppress pathogens such as Clostridium spp., Escherichia coli, and Salmonella. Other than enhancing biosecurity, improvements in productivity and performance were also observed. However, clear mechanisms for these improvements were not established. In this study, 20,000 Lohman-Brown layers were provided with phytogenic supplement from 16 to 40 weeks of age, and performance parameters were assessed against the same number of unsupplemented control birds. The performance results showed that the birds with phytogenic supplementation presented consistently reduced mortality, increased rate of lay, and increased average egg weight. Functional analysis through shotgun sequencing of cecal metagenomes confirmed a substantial functional shift in the microbial community, showing that phytogen significantly reduced the range of microbial functions, including the production of essential vitamins, cofactors, energy, and amino acids. Functional data showed that phytogen supplementation induced a phenotypic shift in intestinal bacteria LPS phenotype toward the less pathogenic form. The study corroborates the use of phytogenic products in antibiotic-free poultry production systems. The productivity improvements in the number and weight of eggs produced during Spotty Liver Disease justify further optimizing phytogenic alternatives for use in high-risk open and free-range poultry systems. IMPORTANCE The present study establishes the beneficial effects of the continuous phytogenic supplementation reflected in reduced diarrhea and mortality and higher egg productivity under normal conditions and during a natural outbreak of Spotty Liver Disease. Our data points to the importance of phytogen-driven alteration of microbial pathogenicity and fitness-related functional capabilities revealed on the commercial layer farm. Phytogenic product showed an ability to improve the bird's welfare and sustainability in free-range poultry production systems." @default.
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- W4295279314 date "2022-09-22" @default.
- W4295279314 modified "2023-10-16" @default.
- W4295279314 title "Phytogen Improves Performance during Spotty Liver Disease by Impeding Bacterial Metabolism and Pathogenicity" @default.
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- W4295279314 doi "https://doi.org/10.1128/aem.00758-22" @default.
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