TABLE 2.
Effects of adaptation to sublethal stresses on survival in lethal concentrations of bile saltsa
| Adaptation | % Survival after bile salt challenge | Log increase in survival |
|---|---|---|
| Control | 0.001 ± 0 | |
| Bile salts (0.08%) | 37.0 ± 1.1 | 4.57 |
| Acid (pH 3.5) | 1.30 ± 0.05 | 3.11 |
| Heat (42°C) | 1.00 ± 0.03 | 3.00 |
| NaCl (5%) | 13.38 ± 0.80 | 4.13 |
| SDS (0.01%) | 14.54 ± 1.30 | 4.16 |
a
Cultures were grown to log phase, adapted to the appropriate stress, and challenged with 0.3% (wt/vol) sodium cholate-sodium deoxycholate (1:1). The results shown are averages of triplicate experiments ± standard deviations.