Table 5.
Average lag phase durations, mean maximum growth rates, and mean maximum optical densities of L. monocytogenes HL06BCA and its mutants HL06BCAΔmdrL and HL06BCAΔlde in BHI broth with and without BC.
| Growth parameter | Medium | Strain | ||
|---|---|---|---|---|
| HL06BCA | HL06BCAΔmdrL | HL06BCAΔlde | ||
| Lag-phase duration (h)a | BHI | 3.11 ± 0.030 | 3.54 ± 0.352 | 3.62 ± 0.101 |
| BHI+BC | 4.00 ± 0.186 | 10.70 ± 0.269**** | 4.85 ± 0.472 | |
| Mean maximum growth rate ±SD(OD_600units/h)^a | BHI | 0.190 ± 0.011 | 0.163 ± 0.016 | 0.170 ± 0.005 |
| BHI+BC | 0.154 ± 0.003 | 0.109 ± 0.002*** | 0.128 ± 0.011 | |
| Mean maximum optical density ±SD(OD_600units)^a | BHI | 1.04 ± 0.030 | 1.06 ± 0.009 | 1.06 ± 0.011 |
| BHI+BC | 1.04 ± 0.028 | 0.94 ± 0.012* | 0.95 ± 0.051* | |
a
Significantly decreased values compared to the corresponding value of HL06BCA are indicated by asterisks (
*
P < 0.05;
***
P < 0.001;
****
P < 0.0001). P-values were obtained using independent samples 2-tailed t-test (SPSS Statistics 23).