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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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Shigella flexneri (Broth Culture, Anaerobic)

Input Conditions

Range: 12 to 37 °C
Range: 5.5 to 7.5
Range: 0.5 to 4.0 (% [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:0.08
    • LCL:0.07
    • UCL:0.09
  • Lag Phase Duration (h):
    • Mean:14.7
    • LCL:11.3
    • UCL:19.1
  • Maximum Population Density: 8.23 (log10 cfu/ml)
Modeled Growth
Time (h) log10 cfu/ml
Mean LCL UCL
0.00 3.032 3.019 3.047
0.50 3.035 3.021 3.052
1.00 3.039 3.024 3.059
1.50 3.043 3.026 3.065
2.00 3.048 3.029 3.073
2.50 3.053 3.032 3.080
3.00 3.058 3.035 3.089
3.50 3.064 3.039 3.098
4.00 3.071 3.042 3.108
4.50 3.077 3.046 3.118
5.00 3.085 3.051 3.130
5.50 3.092 3.055 3.142
6.00 3.101 3.060 3.155
6.50 3.109 3.065 3.168
7.00 3.119 3.071 3.183
7.50 3.129 3.077 3.198
8.00 3.139 3.083 3.215
8.50 3.150 3.090 3.232
9.00 3.162 3.097 3.250
9.50 3.175 3.104 3.269
10.00 3.188 3.112 3.289
10.50 3.201 3.121 3.310
11.00 3.216 3.130 3.331
11.50 3.231 3.139 3.354
12.00 3.247 3.149 3.378
12.50 3.263 3.159 3.403
13.00 3.281 3.170 3.428
13.50 3.299 3.181 3.455
14.00 3.317 3.193 3.482
14.50 3.337 3.205 3.511
15.00 3.357 3.218 3.540
15.50 3.378 3.231 3.571
16.00 3.399 3.245 3.602
16.50 3.422 3.259 3.634
17.00 3.445 3.274 3.667
17.50 3.469 3.290 3.701
18.00 3.494 3.306 3.736
18.50 3.519 3.323 3.771
19.00 3.545 3.340 3.808
19.50 3.572 3.358 3.845
20.00 3.599 3.376 3.883
20.50 3.628 3.395 3.921
21.00 3.656 3.415 3.961
21.50 3.686 3.435 4.001
22.00 3.716 3.456 4.041
22.50 3.747 3.477 4.083
23.00 3.779 3.499 4.125
23.50 3.811 3.521 4.167
24.00 3.844 3.544 4.210
24.50 3.877 3.568 4.253
25.00 3.911 3.592 4.297
25.50 3.945 3.617 4.341
26.00 3.980 3.642 4.386
26.50 4.016 3.667 4.431
27.00 4.052 3.694 4.476
27.50 4.088 3.720 4.522
28.00 4.125 3.748 4.568
28.50 4.162 3.775 4.614
29.00 4.200 3.804 4.661
29.50 4.238 3.832 4.707
30.00 4.276 3.861 4.754
30.50 4.315 3.891 4.800
31.00 4.354 3.921 4.847
31.50 4.394 3.951 4.894
32.00 4.433 3.982 4.941
32.50 4.473 4.013 4.988
33.00 4.513 4.045 5.035
33.50 4.554 4.077 5.082
34.00 4.594 4.109 5.128
34.50 4.635 4.142 5.175
35.00 4.676 4.175 5.221
35.50 4.717 4.208 5.268
36.00 4.758 4.242 5.314
36.50 4.799 4.276 5.359
37.00 4.840 4.310 5.405
37.50 4.882 4.344 5.451
38.00 4.923 4.379 5.496
38.50 4.964 4.414 5.541
39.00 5.006 4.449 5.585
39.50 5.047 4.484 5.629
40.00 5.088 4.519 5.673
40.50 5.129 4.555 5.717
41.00 5.170 4.591 5.760
41.50 5.211 4.626 5.803
42.00 5.252 4.662 5.845
42.50 5.292 4.698 5.887
43.00 5.333 4.734 5.929
43.50 5.373 4.771 5.970
44.00 5.413 4.807 6.011
44.50 5.453 4.843 6.051
45.00 5.493 4.880 6.091
45.50 5.533 4.916 6.130
46.00 5.572 4.952 6.169
46.50 5.611 4.989 6.208
47.00 5.650 5.025 6.246
47.50 5.688 5.061 6.283
48.00 5.726 5.097 6.320
48.50 5.764 5.134 6.357
49.00 5.802 5.170 6.393
49.50 5.839 5.206 6.428
50.00 5.877 5.242 6.463
50.50 5.913 5.277 6.498
51.00 5.950 5.313 6.532
51.50 5.986 5.349 6.565
52.00 6.022 5.384 6.598
52.50 6.057 5.420 6.631
53.00 6.092 5.455 6.663
53.50 6.127 5.490 6.695
54.00 6.161 5.524 6.726
54.50 6.195 5.559 6.756
55.00 6.229 5.594 6.786
55.50 6.262 5.628 6.816
56.00 6.295 5.662 6.845
56.50 6.327 5.696 6.873
57.00 6.359 5.729 6.902
57.50 6.391 5.763 6.929
58.00 6.422 5.796 6.956
58.50 6.453 5.829 6.983
59.00 6.484 5.862 7.009
59.50 6.514 5.894 7.035
60.00 6.544 5.926 7.060
60.50 6.573 5.958 7.085
61.00 6.602 5.990 7.109
61.50 6.631 6.022 7.133
62.00 6.659 6.053 7.157
62.50 6.687 6.084 7.180
63.00 6.714 6.114 7.203
63.50 6.741 6.145 7.225
64.00 6.768 6.175 7.247
64.50 6.794 6.205 7.268
65.00 6.820 6.234 7.289
65.50 6.846 6.263 7.309
66.00 6.871 6.292 7.329
66.50 6.896 6.321 7.349
67.00 6.920 6.349 7.369
67.50 6.944 6.377 7.388
68.00 6.968 6.405 7.406
68.50 6.991 6.432 7.424
69.00 7.014 6.460 7.442
69.50 7.037 6.486 7.460
70.00 7.059 6.513 7.477
70.50 7.081 6.539 7.494
71.00 7.103 6.565 7.510
71.50 7.124 6.591 7.526
72.00 7.145 6.616 7.542
72.50 7.165 6.641 7.557
73.00 7.185 6.666 7.573
73.50 7.205 6.691 7.587
74.00 7.225 6.715 7.602
74.50 7.244 6.739 7.616
75.00 7.263 6.762 7.630
75.50 7.281 6.785 7.644
76.00 7.300 6.808 7.657
76.50 7.318 6.831 7.670
77.00 7.335 6.853 7.683
77.50 7.352 6.875 7.695
78.00 7.369 6.897 7.707
78.50 7.386 6.919 7.719
79.00 7.403 6.940 7.731
79.50 7.419 6.961 7.742
80.00 7.435 6.982 7.754
80.50 7.450 7.002 7.765
81.00 7.465 7.022 7.775
81.50 7.480 7.042 7.786
82.00 7.495 7.061 7.796
82.50 7.510 7.081 7.806
83.00 7.524 7.100 7.816
83.50 7.538 7.118 7.825
84.00 7.551 7.137 7.835
84.50 7.565 7.155 7.844
85.00 7.578 7.173 7.853
85.50 7.591 7.191 7.862
86.00 7.604 7.208 7.870
86.50 7.616 7.225 7.879
87.00 7.629 7.242 7.887
87.50 7.641 7.259 7.895
88.00 7.652 7.275 7.903
88.50 7.664 7.291 7.910
89.00 7.675 7.307 7.918
89.50 7.686 7.323 7.925
90.00 7.697 7.338 7.932
90.50 7.708 7.354 7.939
91.00 7.719 7.369 7.946
91.50 7.729 7.383 7.952
92.00 7.739 7.398 7.959
92.50 7.749 7.412 7.965
93.00 7.759 7.426 7.972
93.50 7.768 7.440 7.978
94.00 7.778 7.454 7.984
94.50 7.787 7.467 7.989
95.00 7.796 7.480 7.995
95.50 7.805 7.493 8.001
96.00 7.813 7.506 8.006
96.50 7.822 7.519 8.011
97.00 7.830 7.531 8.016
97.50 7.838 7.543 8.021
98.00 7.846 7.555 8.026
98.50 7.854 7.567 8.031
99.00 7.862 7.579 8.036
99.50 7.869 7.590 8.040
100.00 7.877 7.601 8.045
Source:

L.L Zaika, E. Moulden, L. Weimer, J.G. Phillips and R.L. Buchanan, Model for the Combined Effects of Temperature, Initial pH, Sodium Chloride and Sodium Nitrite Concentrations on Anaerobic Growth of Shigella flexneri:  International Journal of Food Microbiology (1994) 23:345-358.