Table 1.
Mathematical modeling of the growth of E. coli O157:H7 adhered to the epicarp of vegetables and fruits. The Gompertz (A, B, C, M) and derived parameters (GT, generation time; EGR, exponential growth rate; LPD, lag-phase duration; MPD, maximum population density) are shown. Data are presented as mean ± standard error (n = 3). The letters between the columns indicate significant differences (p < 0.05).
|
A (log CFU/mL) |
Bgrowth (h) |
C (log CFU/mL) |
M (h) |
GT (h) |
EGR (log CFU/mL/h) |
LPD (h) |
MPD (log CFU/mL) |
|||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean | SE | Mean | SE | Mean | SE | Mean | SE | Mean | SE | Mean | SE | Mean | S.E | Mean | S.E | |||||||||
| Tomato | 2.819 | 0.12 | a | 1.498 | 0.60 | a | 2.060 | 0.59 | a | 3.631 | 0.03 | a | 0.398 | 0.11 | a | 0.881 | 0.23 | a | 2.895 | 1.53 | a | 4.279 | 0.54 | a |
| Beet | 2.139 | 0.12 | b | 1.684 | 1.30 | a | 2.729 | 1.20 | a | 2.009 | 0.38 | b | 0.562 | 0.03 | a | 0.540 | 0.03 | a | 2.230 | 1.50 | a | 4.868 | 0.27 | b |
| Radish | 2.507 | 0.15 | a | 1.431 | 0.63 | a | 2.537 | 0.80 | a | 2.032 | 0.13 | b | 0.336 | 0.07 | a | 0.968 | 0.18 | a | 1.026 | 0.37 | a | 5.044 | 0.69 | b |
| Chili | 2.573 | 0.15 | a | 1.344 | 0.92 | a | 2.351 | 1.00 | a | 2.066 | 0.55 | b | 0.632 | 0.07 | a | 0.491 | 0.06 | a | 2.709 | 1.30 | a | 4.924 | 1.05 | b |
| Cucumber | 2.742 | 0.05 | a | 1.790 | 0.84 | a | 1.971 | 0.79 | a | 3.351 | 0.17 | a | 0.413 | 0.10 | a | 0.806 | 0.16 | a | 1.966 | 0.69 | a | 4.314 | 0.85 | a |
| Onion | 2.804 | 0.03 | a | 1.286 | 0.59 | a | 1.921 | 0.61 | a | 2.961 | 0.06 | a | 0.480 | 0.06 | a | 0.647 | 0.08 | a | 2.193 | 0.74 | a | 4.125 | 0.63 | a |
| F-value | 5.193 | 0.053 | 0.147 | 3.766 | 1.953 | 1.847 | 0.349 | 4.052 | ||||||||||||||||
| p-value | 0.009 | 0.998 | 0.977 | 0.045 | 0.159 | 0.178 | 0.873 | 0.048 | ||||||||||||||||