Human milk bacterial and viral microbiota composition according to the delivery mode and also gestational age

This study includes 88 samples from 44 mothers.There were two samples from each mother (first one 7 days of baby life and the second one at 45 days of life).There were 5 groups:1- Normal delivery term newborns: 16 milk samples from 8 mothers2- Preterm delivery group: 26 milk samples from 13 mothers3- Caesarean section delivery: 18 milk samples from 9 mothers4- Small for gestational age babies: 14 milk samples from 7 mothers5- Large for gestational ages babies: 14 milk samples from 7 mothersThe aim was the comparison of these groups (e.g normal delivery vs. C/S delivery) and also the microbiota composition changes between day 7 and day 45 for each human milk sample. For all samples, the metagenomic analysis of the bacterial communities was carried out using the Illumina NextSeq with 150 bp x2 chemistry.