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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
Line chart of data points for modeled growth. 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
0.00 3.014 3.012 3.017
0.25 3.017 3.014 3.020
0.50 3.019 3.015 3.024
0.75 3.022 3.018 3.029
1.00 3.026 3.020 3.034
1.25 3.030 3.023 3.040
1.50 3.034 3.025 3.047
1.75 3.039 3.029 3.054
2.00 3.045 3.032 3.063
2.25 3.051 3.036 3.073
2.50 3.058 3.040 3.083
2.75 3.065 3.045 3.095
3.00 3.073 3.050 3.108
3.25 3.082 3.055 3.123
3.50 3.092 3.061 3.139
3.75 3.102 3.067 3.156
4.00 3.113 3.074 3.175
4.25 3.126 3.081 3.195
4.50 3.139 3.089 3.217
4.75 3.153 3.098 3.241
5.00 3.168 3.107 3.267
5.25 3.185 3.116 3.294
5.50 3.202 3.127 3.323
5.75 3.221 3.138 3.354
6.00 3.241 3.149 3.386
6.25 3.261 3.162 3.421
6.50 3.284 3.175 3.457
6.75 3.307 3.189 3.495
7.00 3.331 3.203 3.535
7.25 3.357 3.219 3.577
7.50 3.384 3.235 3.621
7.75 3.413 3.252 3.666
8.00 3.442 3.270 3.713
8.25 3.473 3.288 3.762
8.50 3.505 3.308 3.813
8.75 3.539 3.328 3.865
9.00 3.573 3.349 3.918
9.25 3.609 3.371 3.973
9.50 3.646 3.394 4.030
9.75 3.684 3.418 4.088
10.00 3.724 3.442 4.147
10.25 3.765 3.468 4.207
10.50 3.806 3.494 4.269
10.75 3.849 3.521 4.331
11.00 3.893 3.549 4.395
11.25 3.938 3.578 4.459
11.50 3.984 3.608 4.524
11.75 4.031 3.638 4.590
12.00 4.079 3.670 4.657
12.25 4.128 3.702 4.724
12.50 4.177 3.735 4.792
12.75 4.228 3.769 4.860
13.00 4.279 3.803 4.928
13.25 4.331 3.839 4.997
13.50 4.383 3.875 5.066
13.75 4.436 3.912 5.135
14.00 4.490 3.949 5.204
14.25 4.544 3.987 5.272
14.50 4.599 4.026 5.341
14.75 4.654 4.066 5.410
15.00 4.710 4.106 5.478
15.25 4.766 4.147 5.546
15.50 4.822 4.188 5.614
15.75 4.878 4.230 5.681
16.00 4.935 4.272 5.748
16.25 4.992 4.315 5.814
16.50 5.049 4.358 5.880
16.75 5.106 4.402 5.945
17.00 5.163 4.446 6.010
17.25 5.220 4.490 6.074
17.50 5.277 4.535 6.137
17.75 5.334 4.581 6.199
18.00 5.391 4.626 6.261
18.25 5.447 4.672 6.321
18.50 5.504 4.718 6.381
18.75 5.560 4.764 6.440
19.00 5.616 4.811 6.499
19.25 5.672 4.858 6.556
19.50 5.727 4.904 6.612
19.75 5.782 4.951 6.668
20.00 5.837 4.999 6.723
20.25 5.891 5.046 6.776
20.50 5.945 5.093 6.829
20.75 5.999 5.140 6.881
21.00 6.052 5.187 6.931
21.25 6.104 5.235 6.981
21.50 6.156 5.282 7.030
21.75 6.208 5.329 7.078
22.00 6.259 5.376 7.125
22.25 6.309 5.423 7.171
22.50 6.359 5.470 7.216
22.75 6.408 5.517 7.260
23.00 6.457 5.563 7.303
23.25 6.505 5.610 7.345
23.50 6.553 5.656 7.387
23.75 6.599 5.702 7.427
24.00 6.646 5.748 7.466
24.25 6.691 5.793 7.505
24.50 6.736 5.838 7.542
24.75 6.780 5.883 7.579
25.00 6.824 5.928 7.615
25.25 6.867 5.973 7.650
25.50 6.909 6.017 7.684
25.75 6.951 6.061 7.718
26.00 6.992 6.104 7.750
26.25 7.032 6.147 7.782
26.50 7.072 6.190 7.813
26.75 7.111 6.232 7.843
27.00 7.150 6.274 7.872
27.25 7.187 6.316 7.901
27.50 7.224 6.357 7.929
27.75 7.261 6.398 7.956
28.00 7.297 6.439 7.982
28.25 7.332 6.479 8.008
28.50 7.366 6.518 8.033
28.75 7.400 6.557 8.057
29.00 7.433 6.596 8.081
29.25 7.466 6.635 8.104
29.50 7.498 6.672 8.127
29.75 7.529 6.710 8.148
30.00 7.560 6.747 8.170
30.25 7.590 6.784 8.190
30.50 7.620 6.820 8.211
30.75 7.648 6.855 8.230
31.00 7.677 6.891 8.249
31.25 7.705 6.925 8.268
31.50 7.732 6.960 8.285
31.75 7.759 6.994 8.303
32.00 7.785 7.027 8.320
32.25 7.810 7.060 8.336
32.50 7.835 7.093 8.352
32.75 7.860 7.125 8.368
33.00 7.884 7.156 8.383
33.25 7.907 7.188 8.398
33.50 7.930 7.218 8.412
33.75 7.953 7.249 8.426
34.00 7.975 7.278 8.439
34.25 7.996 7.308 8.452
34.50 8.017 7.337 8.465
34.75 8.038 7.365 8.477
35.00 8.058 7.393 8.489
35.25 8.078 7.421 8.501
35.50 8.097 7.448 8.512
35.75 8.116 7.475 8.523
36.00 8.134 7.501 8.533
36.25 8.152 7.527 8.544
36.50 8.170 7.553 8.554
36.75 8.187 7.578 8.563
37.00 8.204 7.603 8.573
37.25 8.220 7.627 8.582
37.50 8.236 7.651 8.591
37.75 8.252 7.674 8.599
38.00 8.267 7.698 8.608
38.25 8.282 7.720 8.616
38.50 8.296 7.743 8.623
38.75 8.311 7.765 8.631
39.00 8.325 7.786 8.638
39.25 8.338 7.807 8.646
39.50 8.351 7.828 8.652
39.75 8.364 7.849 8.659
40.00 8.377 7.869 8.666
40.25 8.389 7.888 8.672
40.50 8.401 7.908 8.678
40.75 8.413 7.927 8.684
41.00 8.424 7.946 8.690
41.25 8.436 7.964 8.695
41.50 8.447 7.982 8.701
41.75 8.457 8.000 8.706
42.00 8.468 8.017 8.711
42.25 8.478 8.034 8.716
42.50 8.488 8.051 8.721
42.75 8.497 8.067 8.725
43.00 8.507 8.084 8.730
43.25 8.516 8.100 8.734
43.50 8.525 8.115 8.738
43.75 8.534 8.130 8.743
44.00 8.542 8.145 8.747
44.25 8.550 8.160 8.750
44.50 8.559 8.174 8.754
44.75 8.566 8.189 8.758
45.00 8.574 8.202 8.761
45.25 8.582 8.216 8.765
45.50 8.589 8.229 8.768
45.75 8.596 8.243 8.771
46.00 8.603 8.255 8.774
46.25 8.610 8.268 8.777
46.50 8.617 8.280 8.780
46.75 8.623 8.292 8.783
47.00 8.629 8.304 8.786
47.25 8.636 8.316 8.788
47.50 8.642 8.327 8.791
47.75 8.647 8.339 8.793
48.00 8.653 8.350 8.796
48.25 8.659 8.360 8.798
48.50 8.664 8.371 8.800
48.75 8.669 8.381 8.802
49.00 8.674 8.391 8.804
49.25 8.679 8.401 8.806
49.50 8.684 8.411 8.808
49.75 8.689 8.421 8.810
50.00 8.694 8.430 8.812
Source:

Unpublished - USDA ARS Eastern Regional Research Center data.