How to connect with our old friends?

It is very difficult to connect with friendly bacteria because we continuously suppress them...
The first mean is by avoiding as often as possible antibiotics.
The second mean is by eating raw fresh veggies or meat or fish without washing them with chlorinated water.
The third is by increasing fermented foods and drinks.






http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1299202/pdf/5-7400308.pdf
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1774411/pdf/gut05400317.pdf
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3586601/pdf/nihms234453.pdf