Samples of vaginal bacteria will be collected prior to C-section. A piece of gauze will be placed in the birth canal just after antibiotic administration, and removed just before the caesarian procedure begins. This period will be no longer than 1 hour long. However, any amount of time the gauze is in the birth canal will be sufficient to proceed with the swabbing procedure. Once removed from the mother, the gauze will be stored in a sterile container until birth. Immediately after delivery, a trained study team member will swab the neonate with the gauze at multiple body sites, starting with the mouth, the face, and then subsequently the remainder of his/her body. After the swabbing, the 6 samples normally taken from all newborns will be collected.