*Optical density at 600 nm (OD600) was measured after incubation in the MRS broth at 37°C for 24 h under anaerobic atmosphere. The level of each inoculum was 1%. Values were average of triplicates. Va
++, CCFM8246has grown well in given bile salts concentration, the MRS liquid culture medium is turbid and megascopic cell precipitation can be clearly observed; +, CCFM8246 has grown slightly, the MRS
