Enterococcus is normal flora in the gut http://microbewiki.kenyon.edu/index.php/Enterococcus unless it is Vancomycin resistant. Enterococcus (aka VRE) is a Group D streptococcus. This is often "nosocomial" (hospital/nursing home/rehab) aquired. Just found this: http://www.drmyhill.co.uk/wiki/Fermentation_in_the_gut_and_CFS Streptococcus. This ferments to produce large amounts of lactic acid. This may give a tendency to acidosis. Lactic acid is metabolised in the liver by lactate dehydrogenase, so high levels of this may indicate bowel overgrowth with streptococcus. Fermentation produces two isomers of lactic acid, namely L-lactate and D-lactate. It is D-lactate which is the problem, the body cannot metabolise this, it accumulates in mitochondria and inhibits them. One can measure D lactate in the blood stream. Elph68....Any contribution to our collective knowledge is a great help! Thanks for your post. There is so much to learn and for me, too little time. I am fortunate (??) to still work full time. It is a huge challenge for me but I try to keep up with new developments.