title: Efficacy of UV-C irradiation for inactivation of food-borne pathogens on sliced cheese packaged with different types and thicknesses of plastic films.
abstract: In this study, the efficacy of using UV-C light to inactivate sliced cheese inoculated with Escherichia coli O157:H7, Salmonella Typhimurium, and Listeria monocytogenes and, packaged with 0.07 mm films of polyethylene terephthalate (PET), polyvinylchloride (PVC), polypropylene (PP), and polyethylene (PE) was investigated. The results show that compared with PET and PVC, PP and PE films showed significantly reduced levels of the three pathogens compared to inoculated but non-treated controls. Therefore, PP and PE films of different thicknesses (0.07 mm, 0.10 mm, and 0.13 mm) were then evaluated for pathogen reduction of inoculated sliced cheese samples. Compared with 0.10 and 0.13 mm, 0.07 mm thick PP and PE films did not show statistically significant reductions compared to non-packaged treated samples. Moreover, there were no statistically significant differences between the efficacy of PP and PE films. These results suggest that adjusted PP or PE film packaging in conjunction with UV-C radiation can be applied to control foodborne pathogens in the dairy industry.
authors.affiliation: Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, Research Institute for Agricultural and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea.
authors.forename: Jae-Won
authors.initials: JW
authors.lastname: Ha
authors.affiliation: Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, Research Institute for Agricultural and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea.
authors.forename: Kyeong-Hwan
authors.initials: KH
authors.lastname: Back
authors.affiliation: Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, Research Institute for Agricultural and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea.
authors.forename: Yoon-Hee
authors.initials: YH
authors.lastname: Kim
authors.affiliation: Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, Research Institute for Agricultural and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea; Institutes of Green Bio Science & Technology, Seoul National University, Pyeongchang-gun, Gangwon-do 25354, Republic of Korea. Electronic address: Kang7820@snu.ac.kr.
authors.forename: Dong-Hyun
authors.initials: DH
authors.lastname: Kang
mesh_terms: D002611:Cheese / Q000382:microbiology* / Q000528:radiation effects*; D019453:Escherichia coli O157 / Q000254:growth & development / Q000528:radiation effects*; D005506:Food Contamination / Q000517:prevention & control; D005514:Food Irradiation / Q000379:methods*; D018857:Food Packaging / Q000295:instrumentation; D008089:Listeria monocytogenes / Q000254:growth & development / Q000528:radiation effects*; D010969:Plastics / Q000737:chemistry* / Q000528:radiation effects; D012486:Salmonella typhimurium / Q000254:growth & development / Q000528:radiation effects*; D014466:Ultraviolet Rays
chemical_list: D010969:Plastics
keywords: Foodborne pathogen; Inactivation; Plastic packaging film; Sliced cheese; Ultraviolet light