Table 3.
Effect of continuous gaseous ozone flow at 1.07 mg m-3 on the survival of foodborne pathogen cells (in mean log CFU coupon-1) laid on stainless steel and expanded polystyrene for 6 days (T1–T6) at 4°C.
| Strain | T1 | T2 | T3–6 | |||
|---|---|---|---|---|---|---|
| Stainless steel | Expanded polystyrene | Stainless steel | Expanded polystyrene | Stainless steel | Expanded polystyrene | |
| L. grayi DSM 20601t | 5.15 ± 0.05 | 3.25 ± 0.07a | ND | ND | ND | ND |
| L. innocua DSM 20649t | ND | 6.06 ± 0.05b | ND | + | ND | ND |
| s L. ivanovii ssp. ivanovii DSM 20750t | ND | 4.41 ± 0.21c | ND | ND | ND | ND |
| L. welshimeri DSM 20650t | ND | 5.16 ± 0.22d | ND | ND | ND | ND |
| L. monocytogenes DSM 20600t | ND | ND | ND | ND | ND | ND |
| L. monocytogenes LMG 10470 | ND | 5.40 ± 0.44d | ND | ND | ND | ND |
| L. monocytogenes LMG 23189 | ND | 5.06 ± 0.14d | ND | ND | ND | ND |
| L. monocytogenes LMG 23192 | 5.12 ± 0.14 | 4.36 ± 0.32c | ND | 2.60 ± 0.12 | ND | ND |
| L. monocytogenes LMG 23774 | ND | 5.21 ± 0.20d | ND | ND | ND | ND |
| L. monocytogenes LMG 23775 | + | 5.06 ± 0.32d | ND | ND | ND | ND |
| L. monocytogenes LMG 23905 | ND | 4.86 ± 0.42cd | ND | ND | ND | ND |
ND-Viable cells of target microorganism not detected after the enrichment procedure.
+-Viable cells of target microorganism found on ALOA selective agar plates after the enrichment procedure.
Values are means (SD). Within columns, means followed by different lowercase letters are significantly different (P < 0.05).