Thermal inactivation of Listeria monocytogenes in ground beef under isothermal and dynamic temperature conditions

摘要: Abstract The objective of this research was to compare the suitability three kinetic models for describing survival a cocktail Listeria monocytogenes in ground beef under both isothermal and dynamic temperature conditions. Ground (93% lean), inoculated with 4-strain L. monocytogenes, subjected heating at 57, 60, 63, or 66 °C develop models. Experimental data showed that curves were not strictly linear downwardly concaved. inactivation better described by two nonlinear models, Weibull-type modified Gompertz Analytical results root mean square error values (RMSE) 0.19 0.20 log(CFU/g), significantly smaller than model (0.48 log(CFU/g)). Under conditions, however, only model, RMSE 0.71 log(CFU/g), suitable pathogen. Both grossly underestimated during heating.