This study evaluated growth and thermal inactivation of Listeria monocytogenes and Escherichia coli O157:H7 inoculated in tofu, dougan, qianzhang and doupi which were stored at 4, 25 and 37°C and heated at 55, 60, 65 and 70°C. Growth of the two pathogens in four soya bean products increased with temperature or A w of soya bean products increasing. At the same temperature, lag time (LT) values of L. monocytogenes (16.32-0.94 h) and E. coli O157:H7 (2.66-0.98 h) in tofu which has the highest A w were the lowest. When inoculated soya bean products were stored at 4°C, L. monocytogenes grew slowly, while E. coli O157:H7 did not grow but survived for 14 days. With temperature increasing, δ-values of L. monocytogenes and E. coli O157:H7 in the four soya bean products were decreased. With A w of soya bean products increasing, thermal resistance of L. monocytogenes decreased, while that of E. coli O157: H7 increased. This study could assist retail soya bean products processors and food industry to enhance safety of soya bean products and design thermal processing regimes.
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