Temperature profile log increase Our model (h) PMPa (h) PMPb (h)
1 1 2.14 1.75 4.00
1 2 2.66 2.21 16.00
2 1 2.04 1.68 4.00
2 2 2.46 2.17 8.00
3 1 1.94 1.62 5.00
3 2 2.40 2.17 >20.00
4 1 1.77 1.49 3.50
4 2 2.16 1.94 4.00
PMPa: Ground Beef Model; PMPb: Beef Gravy Model.
Table 3: Predicted times to 1- and 2-log growth of C. perfringens in beef products as predicted by our model, PMP-ground beef model and PMP-beef gravy model, following four assumed process deviations.