glad to see you did a bit of research RAZD, but my answer to your post as it stood originally prior to your edit, wherein you claimed that oral bacteria and lower intestinal bacteria are both benign and neccesary to good health, remains.

Considering your original statement and now a few short moments of research just opening your eyes for apparently the very first time, I can only suggest that you continue to research because your response is still extremely naive. 2 Minutes of research and a stop at wiki does not earn any applause, RAZD.