Bacterial Community Dynamics across the Gastrointestinal Tracts of Dairy Calves during Preweaning Development

Applied and Environmental Microbiology
Juliana DiasGarret Suen

Abstract

Microbial communities play critical roles in the gastrointestinal tracts (GIT) of preruminant calves by influencing performance and health. However, little is known about the establishment of microbial communities in the calf GIT or their dynamics during development. In this study, next-generation sequencing was used to assess changes in the bacterial communities of the rumen, jejunum, cecum, and colon in 26 crossbred calves at four developmental stages (7, 28, 49, and 63 days old). Alpha diversity differed among GIT regions with the lowest diversity and evenness in the jejunum, whereas no changes in alpha diversity were observed across developmental stage. Beta diversity analysis showed both region and age effects, with low numbers of operational taxonomic units (OTUs) shared between regions within a given age group or between ages in a given region. Taxonomic analysis revealed that several taxa coexisted in the rumen, jejunum, cecum, and colon but that their abundances differed considerably by GIT region and age. As calves aged, we observed lower abundances of taxa such as Bacteroides, Parabacteroides, and Paraprevotella with higher abundances of Bulleidia and Succiniclasticum in the rumen. The jejunum also displayed taxonomi...Continue Reading

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Jan 14, 2020·Journal of Animal Science·Harvey C FreetlyJames E Wells
Oct 2, 2019·Frontiers in Microbiology·Wei YanNing Yang
Jan 18, 2020·Scientific Reports·A HussoM Niku
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Jul 16, 2021·Journal of Animal Science and Biotechnology·Déborah Romaskevis Gomes LopesHilário Cuquetto Mantovani
Oct 1, 2021·PloS One·Gercino Ferreira Virginio JuniorCarla Maris Machado Bittar

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