Enhanced heat resistance of Listeria innocua as a surrogate of Listeria monocytogenes after sublethal heat treatment

Abstract Its ability to survive under different environmental conditions makes Listeria monocytogenes a critical concern for food safety. When the microorganisms are exposed sublethal heat treatment above their optimum growth temperature, they increase stress adaptation further treatments. In order investigate resistance of L . monocytogenes, L. innocua as surrogate was at 46 °C 30 and 60 min, prior °C. There no significant difference in D 60°C values between samples min non-pre-heat-treated (control) ( P > 0.05). comparison, caused compared control < Additionally, cluster analysis mass spectra obtained from MALDI-TOF analysed by discriminant principal components (DAPC) group check response proteomic level. However, differentiation responses distinct clusters not revealing.