title: Rearing Room Affects the Non-dominant Chicken Cecum Microbiota, While Diet Affects the Dominant Microbiota.
abstract: The combined effect of environment and diet in shaping the gut microbiota remains largely unknown. This knowledge, however, is important for animal welfare and safe food production. For these reasons, we determined the effect of experimental units on the chicken cecum microbiota for a full factorial experiment where we tested the combined effect of room, diet, and antimicrobial treatment. By Illumina Deep sequencing of the 16S rRNA gene, we found that diet mainly affected the dominant microbiota, while the room as a proxy for environment had major effects on the non-dominant microbiota (p = 0.006, Kruskal-Wallis test). We, therefore, propose that the dominant and non-dominant microbiotas are shaped by different experimental units. These findings have implications both for our general understanding of the host-associated microbiota and for setting up experiments related to specific targeting of pathogens.
authors.affiliation: Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences , Ås , Norway.
authors.forename: Jane
authors.initials: J
authors.lastname: Ludvigsen
authors.affiliation: Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences , Ås , Norway.
authors.forename: Birger
authors.initials: B
authors.lastname: Svihus
authors.affiliation: Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences , Ås , Norway.
authors.forename: Knut
authors.initials: K
authors.lastname: Rudi
keywords: 16S rRNA gene; Clostridium perfringens; cecum; chicken; microbiota