Inactivation of E. coli O157:H7 on blueberries by electrolyzed water, ultraviolet light, and ozone

Journal of Food Science
Chyer Kim, Yen-Con Hung

Abstract

Increased interest in blueberries due to their nutritional and health benefits has led to an increase in consumption. However, blueberries are consumed mostly raw or minimally processed and are susceptible to microbial contamination like other type of fresh produce. This study was, therefore, undertaken to evaluate the efficacy of electrostatic spray of electrolyzed oxidizing (EO) water, UV light, ozone, and a combination of ozone and UV light in killing Escherichia coli O157:H7 on blueberries. A 5-strain mixture of E. coli O157:H7 were inoculated on the calyx and skin of blueberries and then subjected to the treatments. Electrostatic EO water spray reduced initial populations of E. coli O157:H7 by only 0.13 to 0.24 log CFU/g and 0.88 to 1.10 log CFU/g on calyx and skin of blueberries, respectively. Ozone treatment with 4000 mg/L reduced E. coli O157:H7 by only 0.66 and 0.72 log CFU/g on calyx and skin of blueberries, respectively. UV light at 20 mW/cm² for 10 min was the most promising single technology and achieved 2.14 and greater than 4.05 log reductions of E. coli O157:H7 on the calyx and skin of blueberries, respectively. The combination treatment of 1 min ozone and followed by a 2 min UV achieved more than 1 and 2 log ad...Continue Reading

References

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Citations

Feb 25, 2014·Journal of the Air & Waste Management Association·Chi-Yu ChuangWei Fang
Feb 20, 2014·Food Microbiology·Yaoxin Huang, Haiqiang Chen
Jul 27, 2015·International Journal of Food Microbiology·Chuhan LiuHaiqiang Chen
Jun 11, 2014·Journal of the Science of Food and Agriculture·Marcin GlowaczDeborah Rees
Nov 8, 2014·Biotechnology Progress·Markus Walkling-RibeiroMansel W Griffiths
Dec 6, 2014·Food Microbiology·Ginés Benito Martínez-HernándezFrancisco Artés-Hernández
Jul 1, 2015·International Journal of Food Microbiology·Achyut AdhikariShyam S Sablani
Nov 4, 2016·Journal of the Science of Food and Agriculture·Yukiko WadamoriMalik A Hussain
Mar 9, 2017·Journal of Food Protection·Yen-Te LiaoShyam Sablani
Mar 5, 2018·Journal of Applied Microbiology·J Van ImpeA Režek Jambrak
Apr 19, 2017·Journal of Food Science and Technology·Fera R DewiChristopher M Burke
Dec 22, 2020·International Journal of Food Microbiology·Shiyun Yao, Haiqiang Chen
Nov 1, 2020·Foods·Liliana Pérez-LavalleAntonio Valero
Dec 19, 2020·Comprehensive Reviews in Food Science and Food Safety·Hongchao ZhangStratton T Wimsatt

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