Fast and slow-growing breeds: characterisation of broiler caecal microbiota development throughout the growing period [post]

Laura Montoro Dasí, Arantxa Villagra, Maria de Toro, María Teresa Pérez-Gracia, Santiago Vega, Clara Marin
2020 unpublished
Background: The caecal microbiota and its modulation play an important role in animal health, productivity and disease control in poultry production. In this sense, it could be considered as a biomarker of poultry health. Furthermore, due to the emergence of resistant bacteria and the increasing social pressure to establish animal-friendly management on farms, producers are motivated to select more extensive and antibiotic-free breeds. It is therefore necessary to gain better knowledge on the
more » ... knowledge on the development of major bacteria in healthy broilers, both in commercial fast-growing and in new slow-growing breeds. Hence, the aim of this study was to characterise caecal microbiota in two genetic poultry breeds throughout the growing period using 16S rRNA sequencing analysis. Results: A total of 50 caecal pools (25 per breed) were sequenced by the 16S rRNA method. The complexity of caecal microbiota composition increased significantly as animals grew. Furthermore, there were statistical differences between breeds at the end of the growing period. The dominant phyla throughout the production cycle were Firmicutes, Bacteroidetes and Proteobacteria. The predominantly identified genera were Ruminococcus spp., Lactobacillus spp. and Bacteroides spp.Conclusion: The results showed that the main caecal bacteria for both breeds were similar. Thus, these phyla or genera should be considered as biomarkers of poultry health in the evaluation of different treatments applied to animals.
doi:10.21203/rs.3.rs-22748/v1 fatcat:eopch56up5ctthedugyaqlbwoq