microorganism to be qualified as a probiotic, a number of
selection criteria have to be met. Firstly, it has to be safe for
human consumption, not conferring any pathogenic or toxic
effects; secondly, it would be better to be originated from the
intestinal tract of healthy persons so that such microorganisms
are regarded safe for humans and best adapted to the
ecology of the gut; thirdly, it has to be tolerant to gastric and
bile acids as well as sufficiently resistant to digestive
enzymes to enable its survival after passing the intestinal
tract; and lastly, allowing the detection of parameters con-
firming a positive influence on the intestinal flora such
as viability, adhesion to intestinal epithelial cells, and capability
of reproduction in the human intestine
microorganism to be qualified as a probiotic, a number ofselection criteria have to be met. Firstly, it has to be safe forhuman consumption, not conferring any pathogenic or toxiceffects; secondly, it would be better to be originated from theintestinal tract of healthy persons so that such microorganismsare regarded safe for humans and best adapted to theecology of the gut; thirdly, it has to be tolerant to gastric andbile acids as well as sufficiently resistant to digestiveenzymes to enable its survival after passing the intestinaltract; and lastly, allowing the detection of parameters con-firming a positive influence on the intestinal flora suchas viability, adhesion to intestinal epithelial cells, and capabilityof reproduction in the human intestine
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