Table 2.
Strain | Stainless steel | Polypropylene | Glass | Expanded polystyrene | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
T0 | T6 |
T0 | T6 |
T0 | T6 |
T0 | T6 |
|||||
O3 | C | O3 | C | O3 | C | O3 | C | |||||
L. monocytogenes LMG 10470 | 6.42 ± 0.14a | ND | 6.14 ± 0.51a | 6.22 ± 0.26a | ND | 6.08 ± 0.11a | 6.70 ± 0.27a | ND | 5.46 ± 0.16b | 6.34 ± 0.25a | ND | 5.21 ± 0.28b |
E. coli ATCC 35401 | 5.36 ± 0.36a | ND | ND | 5.91 ± 0.33a | ND | 3.60 ± 0.24b | 5.56 ± 0.36a | ND | ND | 5.62 ± 0.90a | ND | ND |
P. aeruginosa DSM 939 | 7.11 ± 0.22a | ND | ND | 7.18 ± 0.90a | ND | 3.30 ± 0.16b | 7.44 ± 0.48a | ND | ND | 7.81 ± 0.11a | ND | ND |
S. aureus NCTC 8325 | 5.56 ± 0.05a | ND | ND | 5.70 ± 0.63a | ND | ND | 5.27 ± 0.32a | ND | ND | 5.61 ± 0.44a | ND | ND |
C-inoculated but un-ozonated coupons (control).
ND-not detected after the enrichment procedure described in the Section “Enumeration of Survivors.”
Values are means (±SD). Within rows, means followed by different lowercase letters are significantly different (P < 0.05).