So much has already been said here about microflora And so much more could be said😁 For instance, how about the information that bacteria appear in the human body even before birth - they are in the meconium. The next "batch" of bacteria appears after passing through the birth canal, and then with the mother's milk. One of the baby's first bacteria is Lactobacillus. It is the one that gives the baby the ability to digest its mother's milk.