W e are always concerned about everyone around us, not just the people, but animals and even bugs. There is a constant tug of war going on between these good and bad life forms. Bowel microflora Gut is sterile at birth.
Bacteria start appearing as soon as the baby starts feeding.
These bacteria comprise the bowel flora, which varies not only between different animal species but also between individuals of the same species. The composition of bowel flora also depends upon age, race and diet of the person. The actual number of bowel bacteria varies in different parts of the digestive tract. The esophagus contains the bacteria swallowed with food, but very few of them survive the stomach acid. The first half of the small intestine thus has low populations of bacteria.