F6 cultured in MRS-THIO broth was 2.33 h. In contrast, the time needed
for a 0.3-unit increase in absorbance at 620 nm by F6 cultured in
MRS-THIO broth with bile salts was 2.99 h. So the delay of growth
(the lag time) for F6 was 0.66 h, which could be judged as tolerant
strain (Table 3). Furthermore, the highest tolerant level of F6 to bile
salts was 1.8% (Table 4).