Table 1.
Estimated model parameters of the Geeraerd et al. (2000) model obtained following inactivation of the 1 and 7 day(s)-old L. monocytogenes, S. Typhimurium, and dual-species model biofilms using the air-based SBD system.
| Single-Species L. monocytogenes 1-day-old |
Single-Species L. monocytogenes 7-day-old |
Single-Species S. Typhimurium 1 Day Old |
Single-Species S. Typhimurium 7-day-old |
Dual-Species 1-day-old |
Dual-Species 7-day-old |
|
|---|---|---|---|---|---|---|
| 23 Log10 N0 general medium 15 4 (log(CFU/cm2)) | b 7.04 ± 0.23 b A 1 | a 6.32 ± 0.11 b A | a 5.96 ± 0.17 a A 1 | a 5.69 ± 0.18 a A | ab 5.84 ± 0.21 a A | ac 5.69 ± 0.16 a A |
| 23 Log10 N0 PALCAM medium 15 4 (log(CFU/cm2)) | b 6.99 ± 0.25 b A 1 | a 6.18 ± 0.10 b A | NA | NA | aa 5.00 ± 0.23 a A | aa 4.79 ± 0.16 a A |
| 23 Log10 N0 XLD medium 15 4 (log(CFU/cm2)) | NA | NA | a 5.80 ± 0.20 a A 1 | a 5.31 ± 0.33 a A | ab 5.56 ± 0.30 a A | ab 5.11 ± 0.13 a A |
| 23kmax general medium 15 4 (1/min) | b 0.705 ± 0.192 a A 1 | a 0.195 ± 0.018 a A | a 0.605 ± 0.116 a A 1 | a 0.396 ± 0.085 a A | aa 0.529 ± 0.131 a A | bb 2.002 ± 0.661 b B |
| 23kmax PALCAM medium 15 4 (1/min) | b 0.826 ± 0.265 a A 1 | a 0.199 ± 0.017 a A | NA | NA | aa 0.650 ± 0.227 a A | aa 0.517 ± 0.159 b A |
| 23kmax XLD medium 15 4 (1/min) | NA | NA | a 0.663 ± 0.114 a A 1 | a 0.722 ± 0.195 a A | aa 0.618 ± 0.160 a A | bb 1.702 ± 0.482 b A |
| 23 Log10 Nres general medium 15 4 (log(CFU/cm2)) | 4.57 ± 0.22 b B 1 | / | a 3.46 ± 0.17 a B 1 | a 3.25 ± 0.22 a A | ab 3.44 ± 0.22 a A | bc 4.17 ± 0.10 b B |
| 23 Log10 Nres PALCAM medium 15 4 (log(CFU/cm2)) | 4.52 ± 0.23 b B 1 | / | NA | NA | ab 3.01 ± 0.21 a A | aa 3.13 ± 0.16 B |
| 23 Log10 Nres XLD medium 15 4 (log(CFU/cm2)) | NA | NA | a 2.57 ± 0.22 a B 1 | a 1.96 ± 0.35 a A | aa 2.41 ± 0.32 a A | bb 3.64 ± 0.09 b B |
| 23 Log-reduction general medium 15 4 (log(CFU/cm2)) | a 2.47 ± 0.32 a A 1 | ≈ a 2.53 ± 0.12 b A | a 2.50 ± 0.24 a A 1 | a 2.44 ± 0.28 b A | ba 2.40 ± 0.31 a A | aa 1.51 ± 0.19 a A |
| 23 Log-reduction PALCAM medium 15 4 (log(CFU/cm2)) | a 2.47 ± 0.34 a A 1 | ≈ a 2.60 ± 0.11 b A | NA | NA | aa 1.98 ± 0.30 a A | aa 1.66 ± 0.23 a A |
| 23 Log-reduction XLD medium 15 4 (log(CFU/cm2)) | NA | NA | a 3.23 ± 0.30 a A 2 | a 3.34 ± 0.49 b A | bb 3.15 ± 0.44 a A | aa 1.47 ± 0.16 a A |
| RMSE general medium (/) | 0.653 | 0.396 | 0.490 | 0.532 | 0.615 | 0.389 |
| RMSE PALCAM medium (/) | 0.716 | 0.371 | NA | NA | 0.625 | 0.464 |
| RMSE XLD medium (/) | NA | NA | 0.602 | 0.988 | 0.878 | 0.331 |
1 Influence biofilm type (dual-species vs. single-species): for each biofilm age and each population type, model parameters bearing different superscripts (no small letters in common) are significantly different (p ≤ 0.05); 2 Influence biofilm age: for each population and biofilm type, model parameters bearing different superscripts (no small letters in common) are significantly different (p ≤ 0.05); 3 Influence population type within dual-species biofilm: for each biofilm age, model parameters bearing different subscripts (no small letters in common) are significantly different (p ≤ 0.05); 4 Influence CAP set-up (SBD-air versus SBD-helium): for each biofilm type and population type, model parameters bearing different superscripts (no numbers in common) are significantly different (p ≤ 0.05); 5 Influence CAP set-up (SBD-air versus DBD-helium): for each biofilm age, biofilm type, and population type, model parameters bearing different subscripts (no capital letters in common) are significantly different (p ≤ 0.05).