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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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Listeria monocytogenes (Broth Culture, Aerobic, aW)

Input Conditions

Range: 4 to 37 °C
Range: 4.5 to 7.5
Range: 0.928 to 0.997
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:0.65
    • LCL:0.60
    • UCL:0.70
  • Lag Phase Duration (h):
    • Mean:2.8
    • LCL:2.5
    • UCL:3.1
  • Maximum Population Density: 9.57 (log10 cfu/ml)
Modeled Growth
Time (h) log10 cfu/ml
Mean LCL UCL
0.00 3.021 3.018 3.023
0.25 3.030 3.026 3.035
0.50 3.043 3.037 3.050
0.75 3.060 3.050 3.071
1.00 3.081 3.067 3.097
1.25 3.108 3.089 3.131
1.50 3.141 3.115 3.172
1.75 3.181 3.147 3.223
2.00 3.229 3.184 3.282
2.25 3.285 3.229 3.352
2.50 3.349 3.280 3.433
2.75 3.423 3.339 3.524
3.00 3.506 3.406 3.626
3.25 3.598 3.480 3.739
3.50 3.699 3.562 3.861
3.75 3.809 3.652 3.994
4.00 3.927 3.750 4.135
4.25 4.053 3.855 4.284
4.50 4.187 3.967 4.440
4.75 4.327 4.085 4.602
5.00 4.472 4.210 4.769
5.25 4.623 4.340 4.940
5.50 4.778 4.475 5.114
5.75 4.936 4.615 5.290
6.00 5.097 4.757 5.466
6.25 5.259 4.903 5.642
6.50 5.421 5.051 5.817
6.75 5.584 5.200 5.989
7.00 5.746 5.351 6.160
7.25 5.907 5.501 6.327
7.50 6.066 5.651 6.490
7.75 6.222 5.801 6.648
8.00 6.375 5.949 6.803
8.25 6.525 6.095 6.952
8.50 6.671 6.239 7.095
8.75 6.813 6.380 7.234
9.00 6.950 6.519 7.367
9.25 7.083 6.654 7.494
9.50 7.212 6.786 7.616
9.75 7.336 6.914 7.732
10.00 7.455 7.038 7.842
10.25 7.569 7.159 7.947
10.50 7.679 7.275 8.047
10.75 7.783 7.387 8.141
11.00 7.883 7.496 8.231
11.25 7.979 7.600 8.315
11.50 8.069 7.700 8.395
11.75 8.156 7.796 8.470
12.00 8.238 7.888 8.541
12.25 8.316 7.976 8.608
12.50 8.390 8.060 8.671
12.75 8.460 8.141 8.730
13.00 8.526 8.218 8.785
13.25 8.589 8.291 8.837
13.50 8.648 8.360 8.886
13.75 8.704 8.427 8.932
14.00 8.757 8.490 8.974
14.25 8.806 8.550 9.015
14.50 8.853 8.606 9.052
14.75 8.898 8.660 9.087
15.00 8.939 8.712 9.120
15.25 8.978 8.760 9.150
15.50 9.015 8.806 9.179
15.75 9.050 8.850 9.206
16.00 9.083 8.891 9.231
16.25 9.113 8.930 9.254
16.50 9.142 8.966 9.276
16.75 9.169 9.001 9.296
17.00 9.194 9.034 9.315
17.25 9.218 9.065 9.332
17.50 9.241 9.095 9.349
17.75 9.262 9.122 9.364
18.00 9.281 9.148 9.378
18.25 9.300 9.173 9.392
18.50 9.317 9.196 9.404
18.75 9.333 9.218 9.416
19.00 9.348 9.239 9.426
19.25 9.363 9.259 9.436
19.50 9.376 9.277 9.446
19.75 9.388 9.294 9.454
20.00 9.400 9.311 9.462
20.25 9.411 9.326 9.470
20.50 9.421 9.340 9.477
20.75 9.431 9.354 9.483
21.00 9.440 9.367 9.489
21.25 9.448 9.379 9.495
21.50 9.456 9.390 9.500
21.75 9.463 9.401 9.505
22.00 9.470 9.411 9.510
22.25 9.477 9.421 9.514
22.50 9.483 9.430 9.518
22.75 9.488 9.438 9.522
23.00 9.494 9.446 9.525
23.25 9.499 9.453 9.528
23.50 9.503 9.460 9.531
23.75 9.508 9.467 9.534
24.00 9.512 9.473 9.536
24.25 9.515 9.479 9.539
24.50 9.519 9.484 9.541
24.75 9.522 9.489 9.543
25.00 9.525 9.494 9.545
Source:

R.L. Buchanan, H.G. Stahl and R.C. Whiting, Effects and Interactions of Temperature, pH, Atmosphere, Sodium Chloride, and Sodium Nitrite on the Growth of Listeria monocytogenes:  Journal of Food Protection (1989) 52(12):844-851.

R.L. Buchanan and J.G. Phillips, Response Surface Model for Predicting the Effects of Temperature, pH, Sodium Chloride content, Sodium Nitrite Concentration, and Atmosphere on the Growth of Listeria monocytogenes.:  J. Food Protection (1990) 53:370-376.