Open AccessStreptococcus thermophilus and Lactobacillus delbrueckii subsp. bulgaricus survive gastrointestinal transit of healthy volunteers consuming yogurt
Author(s) -
Mater Denis D.G.,
Bretigny Laurent,
Firmesse Olivier,
Flores MariaJose,
Mogenet Agnès,
Bresson JeanLouis,
Corthier Gérard
Publication year - 2005
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1016/j.femsle.2005.07.006
Subject(s) - streptococcus thermophilus , feces , lactobacillus , gastrointestinal tract , microbiology and biotechnology , biology , gastrointestinal transit , bacteria , streptococcus , human feces , lactobacillus delbrueckii subsp. bulgaricus , human gastrointestinal tract , food science , medicine , biochemistry , genetics
To date, there is significant controversy as to the survival of yogurt bacteria (namely, Streptococcus thermophilus and Lactobacillus delbrueckii subsp. bulgaricus ) after passage through the human gastrointestinal tract. Survival of both bacterial species in human feces was investigated by culture on selective media. Out of 39 samples recovered from 13 healthy subjects over a 12‐day period of fresh yogurt intake, 32 and 37 samples contained viable S. thermophilus (median value of 6.3 × 10 4 CFU g −1 of feces) and L. delbrueckii (median value of 7.2 × 10 4 CFU g −1 of feces), respectively. The results of the present study indicate that substantial numbers of yogurt bacteria can survive human gastrointestinal transit.