Table 2.
Logarithmic reduction (Log10 CFU/mL) of L. monocytogenes planktonic cells after the ozone exposure (O3 = 50 ppm; 10, 30 min and 6 h) compared to control samples.
| Strain ID | Logarithmic Reduction 1,2 | ||
|---|---|---|---|
| 10 min | 30 min | 6 h | |
| ATCC 7644 | 3.2 ± 0.1 a | 3.6 ± 0.3 a | 7.2 ± 0.1 b |
| ATCC 19112 | 3.1 ± 0.2 a | 3.1 ± 0.1 a | 7.5 ± 0.3 b |
| 1 | 3.1 ± 0.3 a | 3.5 ± 0.3 a | ≥7.7 ± 0.1 b |
| 2 | 3.9 ± 0.1 a | 4.3 ± 0.1 a | ≥9.2 ± 0.0 b |
| 6 | 4.2 ± 0.1 a | 4.4 ± 0.1 a | ≥9.2 ± 0.1 b |
| 7 | 3.7 ± 0.2 a | 3.9 ± 0.1 a | ≥9.0 ± 0.1 b |
| 13 | 4.1 ± 0.1 a | 4.0 ± 0.2 a | ≥9.2 ± 0.1 b |
| 16 | 3.3 ± 0.2 a | 3.3 ± 0.1 a | ≥8.2 ± 0.0 b |
| 17 | 3.6 ± 0.0 a | 3.5 ± 0.1 a | 7.4 ± 0.1 b |
| 18 | 4.5 ± 0.1 b | 4.0 ± 0.2 a | ≥9.1 ± 0.1 c |
| 20 | 3.6 ± 0.1 a | 4.2 ± 0.1 b | ≥8.4 ± 0.0 c |
| 25 | 3.5 ± 0.4 a | 3.5 ± 0.1 a | ≥8.2 ± 0.1 b |
| 36 | 3.3 ± 0.1 a | 3.7 ± 0.1 a | ≥8.7 ± 0.1 b |
| 37 | 4.1 ± 0.1 a | 4.2 ± 0.0 a | ≥9.2 ± 0.0 b |
| 38 | 4.1 ± 0.3 a | 4.1 ± 0.3 a | 7.2 ± 0.4 b |
| 40 | 4.1 ± 0.3 a | 3.9 ± 0.1 a | 8.2 ± 0.1 b |
| 64 | 3.7 ± 0.2 a | 4.1 ± 0.4 a | ≥8.8 ± 0.2 b |
| 76 | 3.7 ± 0.2 a | 4.1 ± 0.1 a | ≥8.9 ± 0.1 b |
| G40 | 3.5 ± 0.2 a | 3.5 ± 0.1 a | ≥8.6 ± 0.1 b |
| G46 | 4.1 ± 0.2 a | 4.2 ± 0.1 a | ≥9.1 ± 0.1 b |
| G52 | 4.1 ± 0.2 a | 4.3 ± 0.2 a | ≥9.1 ± 0.2 b |
| G69 | 3.9 ± 0.0 a | 4.1 ± 0.1 a | ≥9.1 ± 0.0 b |
1 Average ± Standard deviation of two replicates. 2 Values followed by different small letters in the same row are significantly different according to Tukey’s multiple comparison test (p < 0.05).