TABLE 1.
Effects of different concentrations of CAZ on viable cell counts of E. coli O55:B5
| CAZ concn (μg/ml) | Viable cell count (log10 CFU/ml)a at the following time (h) after treatment:
|
|||
|---|---|---|---|---|
| 0 | 1 | 2 | 4 | |
| 0 | 7.3 ± 0.1 | 7.1 ± 0.2 | 7.6 ± 0.1b | 8.4 ± 0.1c |
| 2.5 | 7.0 ± 0.1c | 7.1 ± 0.1b | 6.9 ± 0.1b | |
| 5 | 7.0 ± 0.1b | 6.9 ± 0.1c | 6.2 ± 0.2c | |
| 10 | 6.9 ± 0.1c | 6.2 ± 0.1c | 5.5 ± 0.1c | |
| 20 | 6.6 ± 0.2c | 5.9 ± 0.1c | 5.3 ± 0.1c | |
a
Values are reported as mean ± standard deviations (n = 4).
b
Significantly different from the value obtained with the control (0 h) (P < 0.05 by the Mann-Whitney test).
c
Significantly different from the value obtained with the control (0 h) (P < 0.0001 by the Mann-Whitney test).