Evaluation of nonthermal effects of electricity on inactivation kinetics of Staphylococcus aureus and Escherichia coli during ohmic heating of infant formula

This study investigated the nonthermal effects of electricity on microbial inactivation kinetics of Staphylococcus aureus and Escherichia coli during ohmic heating (OH) of infant formula. For this, temperature profiles during OH and conventional heating (CV) processes were matched, and the kinetic parameters were compared at temperatures ranging from 57.5 to 65.0 °C. The inactivation kinetics were analyzed using an inactivation model, which allowed the definition of the thermal tolerance from kmax and D values. For S. aureus, significant differences (p