This question is similar to a previous question, but is not the same.
I was told, you are born with a bacteria in your digestive track that are made by the body. Can a body in development create it's own bacteria from nothing? Also said by the teacher the first time you take an antibiotic it is gone forever? Can a body in development create it own bacteria from stem cells? Is there such a bacteria, can it be cultured and re-introduced into the body?