Enhanced thermal destruction of Listeria monocytogenes and Staphylococcus aureus by the lactoperoxidase system.

Applied and Environmental Microbiology
D N KamauK M Pruitt

Abstract

The lactoperoxidase system (LPS) enhanced thermal destruction of Listeria monocytogenes and Staphylococcus aureus. After LPS activation, biphasic survival curves were observed for L. monocytogenes at 57.8 degrees C and for S. aureus at 55.2 degrees C. The data were consistent with a model that assumed two bacterial populations differing in heat sensitivity. The more heat-sensitive fractions (93% of the L. monocytogenes, 92% of the S. aureus) were killed almost instantly. For these biphasic survival curves, D values were based on the much smaller, less-heat-sensitive fractions. For L. monocytogenes, the D52.2 degrees C values were 30.2 min (untreated milk) and 10.7 min (LPS activated); corresponding D55.2 degrees C values were 8.2 and 1.6 min; corresponding D57.8 degrees C values were 2.3 and 0.5 min. For S. aureus, the D52.2 degrees C values were 33.3 min (untreated milk) and 2.2 min (LPS activated), and the corresponding D55.2 degrees C values were 7.6 and 1.1 min, respectively. The most rapid killing of L. monocytogenes occurred when samples were heated soon after activation of the LPS. Activation of the LPS followed by heating can increase the margin of safety with respect to milkborne pathogens.

References

Oct 17, 1977·European Journal of Biochemistry·T M Aune, E L Thomas
Jun 1, 1976·European Journal of Biochemistry·J S ShindlerW G Bardsley
Jul 1, 1987·Applied and Environmental Microbiology·M P DoyleR D Schultz
Dec 1, 1987·The Journal of Applied Bacteriology·J F Fernandez GarayzabalG Suarez Fernandez
Sep 29, 1988·The New England Journal of Medicine·M J LinnanR Weaver
Jan 1, 1986·Archives of Oral Biology·B Mansson-RahemtullaF Rahemtulla
Feb 14, 1985·The New England Journal of Medicine·D W FlemingA L Reingold
May 1, 1972·Canadian Journal of Microbiology·P O WilkinsR G Murray
Jun 1, 1966·Bacteriological Reviews·M L Gray, A H Killinger
Jan 27, 1983·The New England Journal of Medicine·W F SchlechC V Broome
Feb 1, 1958·Canadian Journal of Microbiology·R E BEARNS, K F GIRARD
Mar 1, 1987·Journal of Food Protection·J LovettJ M Hunt
Dec 1, 1986·Journal of Food Protection·Catherine W Donnelly, Elizabeth H Briggs
Jul 1, 1987·Journal of Food Protection·J G BradshawR M Twedt
Jan 1, 1987·Journal of Food Protection·Catherine W DonnellyL Scott Donnelly

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Citations

Sep 30, 2004·Journal of Food Protection·F DevlieghereJ Debevere
Mar 24, 2007·Foodborne Pathogens and Disease·Michael M KayesDavid A Golden
Jan 1, 2014·Journal of the Science of Food and Agriculture·Isabel R AmadoLorenzo Pastrana
May 27, 2015·Food and Environmental Virology·Surapong RattanakulSatoshi Takizawa
May 16, 2012·Journal of Periodontal Research·K GaneshnarayanD H Fine
Mar 17, 2001·Journal of Food Protection·M E DoyleV N Scott
Oct 1, 2010·Journal of Food Science and Technology·Shivalingsarj Vijaykumar Desai, Mandyam Chakravarathy Varadaraj
Jul 26, 2014·Journal of the Science of Food and Agriculture·Mohammad Sedigh JasourSeyedeh Samaneh Naghibi
Jan 13, 2015·Applied and Environmental Microbiology·Su Jin LeeGwangPyo Ko
May 16, 2018·European Journal of Microbiology & Immunology·Sobiya ShafiqueAqeel Ahmad
May 26, 2001·Applied and Environmental Microbiology·P J Taormina, L R Beuchat
Nov 20, 2019·Food Science and Technology International = Ciencia Y Tecnología De Los Alimentos Internacional·Nene Meltem Keklik
Nov 13, 2009·Free Radical Research·Clare L Hawkins
Mar 3, 2018·International Journal of Hyperthermia : the Official Journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group·Rui LiShaojin Wang
Nov 28, 2020·Preparative Biochemistry & Biotechnology·Esmail M El-Fakharany
Sep 14, 2002·International Journal of Food Microbiology·A T ChhabraM A Cousin

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