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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 (Aerobic)

Input Conditions

Range: 5 to 42 °C
Range: 4.7 to 7.5
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:0.27
    • LCL:0.19
    • UCL:0.36
  • Lag Phase Duration (h):
    • Mean:13.9
    • LCL:10.3
    • UCL:18.7
  • Maximum Population Density: 8.87 (log10 cfu/ml)
Modeled Growth
Time (h) log10 cfu/ml
Mean LCL UCL
0 3.000 3.000 3.000
1 3.000 3.000 3.000
2 3.000 3.000 3.000
3 3.000 3.000 3.001
4 3.001 3.000 3.002
5 3.002 3.001 3.008
6 3.005 3.001 3.022
7 3.010 3.002 3.052
8 3.022 3.005 3.108
9 3.041 3.009 3.201
10 3.073 3.015 3.339
11 3.122 3.025 3.528
12 3.191 3.040 3.766
13 3.284 3.062 4.050
14 3.403 3.091 4.371
15 3.550 3.131 4.718
16 3.723 3.181 5.078
17 3.922 3.245 5.441
18 4.142 3.322 5.796
19 4.381 3.413 6.136
20 4.632 3.519 6.456
21 4.893 3.639 6.752
22 5.158 3.774 7.021
23 5.424 3.921 7.264
24 5.685 4.081 7.480
25 5.940 4.250 7.672
26 6.185 4.428 7.840
27 6.418 4.613 7.987
28 6.639 4.803 8.114
29 6.846 4.996 8.225
30 7.039 5.190 8.320
31 7.218 5.384 8.401
32 7.383 5.576 8.472
33 7.534 5.765 8.531
34 7.671 5.951 8.583
35 7.796 6.131 8.626
36 7.910 6.305 8.663
37 8.013 6.472 8.695
38 8.105 6.633 8.722
39 8.188 6.786 8.744
40 8.263 6.932 8.764
41 8.330 7.070 8.780
42 8.390 7.200 8.794
43 8.443 7.323 8.806
44 8.491 7.438 8.815
45 8.534 7.546 8.824
46 8.572 7.647 8.831
47 8.605 7.742 8.837
48 8.635 7.830 8.842
49 8.662 7.912 8.846
50 8.686 7.987 8.850
Source:

R.C. Benedict, T. Partridge, D. Wells and R.L. Buchanan, Bacillus cereus: Aerobic Growth Kinetics:  Journal of Food Protection (1993) 56(3):211-214