Table 3.
TTD of SEA in cooked chicken meat under various combinations of incubation temperatures and initial inoculation concentrations of S. aureus.
| Incubation temperature(°C) | Designed initial inoculation concentration (log CFU/g) | Actual initial inoculation concentration (SD) (log CFU/g) | Maximum concentration of S. aureus during incubation (SD) (log CFU/g) | Observed TTD (h) | Concentration of S. aureus at the observed TTD (SD) (log CFU/g) | Corrected TTD (SD) (h) | Concentration of S. aureus at the corrected TTD (SD) (logCFU/g) |
|---|---|---|---|---|---|---|---|
| 15 ± 1 | 2 | 2.51 (0.01) | 5.19 (0.05) | nd | – | – | – |
| 15 ± 1 | 3 | 3.59 (0.04) | 5.21 (0.04) | nd | – | – | – |
| 15 ± 1 | 4 | 4.42 (0.02) | 5.21 (0.01) | nd | – | – | – |
| 22 ± 1 | 2 | 2.51 (0.01) | 7.69 (0.06) | 42.0 | 6.88 (0.06) | 36.55 (0.18) | 6.03 (0.17) |
| 22 ± 1 | 3 | 3.59 (0.04) | 7.77 (0.02) | 30.0 | 6.83 (0.08) | 24.94 (0.15) | 6.25 (0.14) |
| 22 ± 1 | 4 | 4.42 (0.02) | 7.83 (0.08) | 18.0 | 6.40 (0.04) | 17.20 (0.19) | 6.28 (0.21) |
| 29 ± 1 | 2 | 2.51 (0.01) | 7.95 (0.09) | 24.0 | 6.61 (0.02) | 21.58 (0.13) | 6.18 (0.16) |
| 29 ± 1 | 3 | 3.59 (0.04) | 8.03 (0.01) | 21.0 | 7.31 (0.05) | 18.41 (0.15) | 6.75 (0.11) |
| 29 ± 1 | 4 | 4.42 (0.02) | 8.12 (0.01) | 18.0 | 7.18 (0.05) | 15.02 (0.11) | 6.96 (0.09) |
| 36 ± 1 | 2 | 2.51 (0.01) | 8.72 (0.03) | 12.0 | 7.64 (0.07) | 9.05 (0.07) | 6.17 (0.05) |
| 36 ± 1 | 3 | 3.59 (0.04) | 8.84 (0.02) | 9.0 | 6.92 (0.06) | 7.03 (0.05) | 5.82 (0.03) |
| 36 ± 1 | 4 | 4.42 (0.02) | 8.84 (0.05) | 9.0 | 7.91 (0.01) | 6.04 (0.09) | 6.43 (0.06) |
nd, no SEA was detected; –, no result.