Modeling of Escherichia coli inactivation by UV irradiation at different pH values in apple cider

Journal of Food Protection
A Quintero-RamosR W Worobo

Abstract

This study examined the effects and interactions of UV light dose (1,800 to 20,331 microJ/cm2) and apple cider pH (2.99 to 4.41) on the inactivation of Escherichia coli ATCC 25922, a surrogate for E. coli O157:H7. A predictive model was developed to relate the log reduction factor of E. coli ATCC 25922 to the UV dose. Bacterial populations for treated and untreated samples were enumerated with the use of nonselective media. The results revealed that UV dose was highly significant in the inactivation of E. coli, whereas pH showed no significant effect at higher UV doses. Doses of 6,500 microJ/cm2 or more were sufficient to achieve a greater than 5-log reduction of E. coli. Experimental inactivation data were fitted adequately by a logistic regression model. UV irradiation is an attractive alternative to conventional methods for reducing bacteria in unpasteurized apple cider.

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Citations

Jan 19, 2006·Journal of Food Protection·Luis GarciaMoustapha Oke
May 24, 2006·Journal of Food Protection·UNKNOWN National Advisory Committee on Microbiological Criteria for Foods
Nov 19, 2013·Applied and Environmental Microbiology·Lisa A JonesChristine D Smart
Apr 18, 2015·Foodborne Pathogens and Disease·Jennifer A CrookJames S Cullor
Nov 6, 2015·BioMed Research International·M GoumaI Álvarez
Aug 15, 2017·Journal of Food Protection·Mengyi Hu, Joshua B Gurtler
Mar 11, 2008·Journal of Food Protection·Jazmin D VojdaniRobert V Tauxe
Dec 5, 2014·Journal of Food Protection·Jessie UsagaRandy W Worobo
Jun 22, 2007·Journal of Dairy Science·K E MatakM D Pierson
Aug 1, 2005·Journal of Food Protection·David J Geveke
Sep 25, 2012·Applied and Environmental Microbiology·E GayánS Condón
Sep 20, 2012·Foodborne Pathogens and Disease·Cristina ArroyoSantiago Condón
Jan 7, 2010·Journal of Food Protection·Qingfang DongRandy W Worobo
Oct 26, 2005·Journal of Food Protection·K E MatakM D Pierson
Jun 28, 2011·Journal of Agricultural and Food Chemistry·Rohan V TikekarLuke F LaBorde
Aug 22, 2007·Journal of Agricultural and Food Chemistry·Xuetong Fan, David J Geveke

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