Expanded models for the non-thermal inactivation of Listeria monocytogenes

Journal of Applied Microbiology
R L BuchananJ G Phillips

Abstract

Previously developed four-variable response surface models for describing the effects of temperature, pH/lactic acid, sodium chloride and sodium nitrite on the time to achieve a 4-log, non-thermal inactivation (t4D) of Listeria monocytogenes in aerobic, acidic environments were expanded to five-variable models that distinguish the effects of pH and acidulant concentration. A total of 18 new variable combinations were evaluated and the inactivation kinetics data appended onto a consolidation of two data sets from earlier studies. The consolidated data set, which included 315 inactivation curves representing 209 unique combinations of the five variables, was analysed by response surface analysis. The quadratic model without backward elimination regression was selected for further evaluation. Three additional quadratic models were generated using the concentrations of undissociated lactic and/or nitrous acids as variables in place of percentage lactic acid and sodium nitrite concentration. Comparison of predicted t4D values against literature values for various food systems indicated that the models provide reasonable initial estimates of the inactivation of L. monocytogenes. The models based on the concentration of undissociated ...Continue Reading

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Citations

Sep 15, 2009·Nitric Oxide : Biology and Chemistry·Andrew MilkowskiNathan S Bryan
Sep 10, 2008·International Journal of Food Microbiology·Tom RossOlivia J McQuestin
Apr 11, 2012·Nitric Oxide : Biology and Chemistry·Jeffrey J Sindelar, Andrew L Milkowski
May 10, 2005·International Journal of Food Microbiology·Olivier CouvertIvan Leguérinel
Oct 16, 2018·Risk Analysis : an Official Publication of the Society for Risk Analysis·Amir Mokhtari, Jane M Van Doren
Sep 16, 2005·Journal of Food Protection·UNKNOWN ILSI Research Foundation, UNKNOWN Risk Science Institute
Sep 25, 2008·Journal of Food Protection·Marios MataragasGeorge-John E Nychas
Apr 16, 2004·Journal of Food Protection·Yildiz KaraibrahimogluKimberly Sokorai
Sep 30, 2004·Journal of Food Protection·F DevlieghereJ Debevere
Jan 24, 2018·EFSA Journal·UNKNOWN EFSA Panel on Biological Hazards (BIOHAZ)Roland Lindqvist

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