Fig. 2

Overview relative abundance main bacterial groups per week (W1-4) in preterm infants delivered vaginally or by CS. Bacterial groups are listed on the genus level with the exception of all Enterobacteriaceae species that were not Escherichia, Klebsiella or Enterobacter. The samples were sorted based upon their patient number in a paired fashion so samples can be tracked over time. All Enterobacteriaceae genera have blue hues for visualization purposes