Microbial modulation via dietary supplementation of quebracho and chestnut tannins in weaning piglets.

A mixture of quebracho and chestnut tannins (1.25%) was evaluated for its efficacy to reduce the negative weaning effects on piglet growth. Microbiota composition was assessed by Illumina MiSeq 16S rRNA gene sequencing on DNA extracted from stools at the end of the trial (40 days). Sequence analysis revealed an increase of Shuttleworthia, Pseudobutyrivibrio, Peptococcus, Anaerostipes and Solobacterium genera in tannin-supplemented group. Conversely, this supplementation reduced the abundance of Syntrophococcus, Atopobium, Mitsuokella, Sharpea and Prevotella genera.