FIG 4.

Distribution of log[D′(80)] for spores of nonproteolytic C. botulinum. The blue solid line represents beliefs from the present study, based on a large collection of previously published results, for the heat resistance of spores in the absence of lysozyme [<logD′(80)> = 0.00, σ_{log[D′(80)]} = 0.55, <z> = 6.7], and the red dotted line represents beliefs for inactivation of the HR fraction of spores in the presence of lysozyme [<logD′(80)> = 2.09, σ_{log[D′(80)]} = 0.51, <z> = 9.3]. The dotted-dashed line illustrates a probability distribution for D values estimated by van Asselt and Zwietering (26) [<logD′(80)> = 0.68, σ_{log[D′(80)]} = 0.71, <z> = 18.6], and the dashed line represents a distribution based on the guidance of the United Kingdom Food Standards Agency of 90°C for 10 min (49) [<logD′(80)> = 1.31, σ_{log[D′(80)]} = 0.65, <z> = 9.2; with the coefficient of variation of the logarithm of the D value taken as 0.5].