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The models are based on extensive experimental data of microbial behavior in liquid microbiological media and food.

There can be no guarantee that predicted values will match those that would occur in any specific food system. Before the models could be used in such a manner, the user would have to validate the models for each specific food of interest.

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Bacillus cereus (vegetative) in Broth Culture (Anaerobic)

Input Conditions

Range: 10 to 42 °C
Range: 5.0 to 9.0
Range: 0.5 to 5.0 (% [g/dL])
Range: 0.0 to 150.0 (ppm)
Range: 1 - 6
Range: 10 - 100 hours
Line chart of data points for modeled transfer. Also available in a table format below the chart.
Modeled Growth Parameters
  • Max Growth Rate (log10 cfu/h):
    • Mean:0.23
    • LCL:0.19
    • UCL:0.28
  • Lag Phase Duration (h):
    • Mean:7.5
    • LCL:6.0
    • UCL:9.4
  • Maximum Population Density: 8.87 (log10 cfu/ml)
Modeled Growth
Time (h) log10 cfu/ml
Mean LCL UCL
0.0 3.014 3.012 3.017
0.5 3.019 3.015 3.024
1.0 3.026 3.020 3.034
1.5 3.034 3.025 3.047
2.0 3.045 3.032 3.063
2.5 3.058 3.040 3.083
3.0 3.073 3.050 3.108
3.5 3.092 3.061 3.139
4.0 3.113 3.074 3.175
4.5 3.139 3.089 3.217
5.0 3.168 3.107 3.267
5.5 3.202 3.127 3.323
6.0 3.241 3.149 3.386
6.5 3.284 3.175 3.457
7.0 3.331 3.203 3.535
7.5 3.384 3.235 3.621
8.0 3.442 3.270 3.713
8.5 3.505 3.308 3.813
9.0 3.573 3.349 3.918
9.5 3.646 3.394 4.030
10.0 3.724 3.442 4.147
10.5 3.806 3.494 4.269
11.0 3.893 3.549 4.395
11.5 3.984 3.608 4.524
12.0 4.079 3.670 4.657
12.5 4.177 3.735 4.792
13.0 4.279 3.803 4.928
13.5 4.383 3.875 5.066
14.0 4.490 3.949 5.204
14.5 4.599 4.026 5.341
15.0 4.710 4.106 5.478
15.5 4.822 4.188 5.614
16.0 4.935 4.272 5.748
16.5 5.049 4.358 5.880
17.0 5.163 4.446 6.010
17.5 5.277 4.535 6.137
18.0 5.391 4.626 6.261
18.5 5.504 4.718 6.381
19.0 5.616 4.811 6.499
19.5 5.727 4.904 6.612
20.0 5.837 4.999 6.723
20.5 5.945 5.093 6.829
21.0 6.052 5.187 6.931
21.5 6.156 5.282 7.030
22.0 6.259 5.376 7.125
22.5 6.359 5.470 7.216
23.0 6.457 5.563 7.303
23.5 6.553 5.656 7.387
24.0 6.646 5.748 7.466
24.5 6.736 5.838 7.542
25.0 6.824 5.928 7.615
25.5 6.909 6.017 7.684
26.0 6.992 6.104 7.750
26.5 7.072 6.190 7.813
27.0 7.150 6.274 7.872
27.5 7.224 6.357 7.929
28.0 7.297 6.439 7.982
28.5 7.366 6.518 8.033
29.0 7.433 6.596 8.081
29.5 7.498 6.672 8.127
30.0 7.560 6.747 8.170
30.5 7.620 6.820 8.211
31.0 7.677 6.891 8.249
31.5 7.732 6.960 8.285
32.0 7.785 7.027 8.320
32.5 7.835 7.093 8.352
33.0 7.884 7.156 8.383
33.5 7.930 7.218 8.412
34.0 7.975 7.278 8.439
34.5 8.017 7.337 8.465
35.0 8.058 7.393 8.489
35.5 8.097 7.448 8.512
36.0 8.134 7.501 8.533
36.5 8.170 7.553 8.554
37.0 8.204 7.603 8.573
37.5 8.236 7.651 8.591
38.0 8.267 7.698 8.608
38.5 8.296 7.743 8.623
39.0 8.325 7.786 8.638
39.5 8.351 7.828 8.652
40.0 8.377 7.869 8.666
Source:

Unpublished - USDA ARS Eastern Regional Research Center data.