Good bacteria are only part of the treatment.
I rarely find it necessary to use drug antifungals for yeast. I have seen them cause far more problems than they solve as they lead to resistant strains of yeast that are very difficult to eradicate. One cannot have ANY sugar or grains at all on the program and should also eliminate all fruit until the symptoms resolve. The most severe cases I have seen usually seem to be related to mercury amalgam fillings. Once the fillings are removed and the mercury is properly detoxified the person generally has a dramatic improvement.