Table 5

Resistance to biological barriers for Bifidobacterium mongoliense strains FR 49/F/2 and FR 41/2
Strains Incubation time Resistance to gastric juicea Resistance to pancreatic juiceb Resistance to bile saltsc
pH 2 pH 3 pH 8 1% 0.5% 0.3%
FR49/f/2 T1 h > 3 log 0.02 ± 0.6 0.13 ± 0.35 ND ND ND
T2 h > 3 log 0.05 ± 0.6 0.44 ± 0.05 ND ND ND
T3 h > 3 log 0.05 ± 0.6 0.46 ± 0.03 ND ND ND
T4 h > 3 log 0.16 ± 0.6 0.46 ± 0.06 ND ND ND
T5 h > 3 log 0.04 ± 0.7 0.50 ± 0.07 ND ND ND
T48 h NA NA NA 3.39 ± 0.34 3.07 ± 0.25 1.76 ± 0.13
FR41/2 T1 h > 3 log −0.04 ± 0.7 0.06 ± 0.09 ND ND ND
T2 h > 3 log 0.11 ± 0.8 0.06 ± 0.06 ND ND ND
T3 h > 3 log 0.29 ± 0.7 0.01 ± 0.15 ND ND ND
T4 h > 3 log 0.51 ± 0.6 0.02 ± 0.10 ND ND ND
T5 h > 3 log 0.61 ± 0.7 0.41 ± 0.24 ND ND ND
T48 h NA NA 4.11 ± 0.00 3.93 ± 0.00 4.14 ± 0.00

Decrease in viable cell counts (log CFU ml-1) after exposure: ato low pH (2 and 3) solutions during 1-5 h at 37°C, bto pancreatic juice solution during 1-5 h at 37°C, cto bile salts (1, 0.5 and 0.3% ) during 48 h at 37°C.

NA: not applicable.

ND: not determined.

Delcenserie et al.

Delcenserie et al. BMC Microbiology 2013 13:239   doi:10.1186/1471-2180-13-239

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