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BioMed Research International - Volume 2014 2014, Article ID 673939, 9 pages -

Research Article

Environmental Microbiology Unit, Department of Public Health, Medical School, University of Patras, Rio, 26500 Patras, Greece

School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland

School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, Ireland

Received 29 November 2013; Accepted 24 January 2014; Published 4 March 2014

Academic Editor: Chrissanthy Papadopoulou

Copyright © 2014 Angeliki Birmpa et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The aim of the current study was to evaluate the effectiveness of three nonthermal light technologies NUV-Vis, continuous UV, and HILP on their ability to inactivate Escherichia coli K12 and Listeria innocua.  E. coli K12 was selected as a representative microorganism for the enterohaemorrhagic foodborne pathogen E. coli O157:H7 and L. innocua as a surrogate microorganism for the common foodborne pathogen Listeria monocytogenes, respectively. The liquid matrix used for the disinfection experiments was a liquid matrix MRD solution. The results of the present study show that the HILP treatment inactivated both E. coli and L. innocua more rapidly and effectively than either continuous UV-C or NUV-vis treatment. With HILP at 2.5 cm from the lamp, E. coli and L. innocua populations were reduced by 3.07 and 3.77 log10 CFU-mL, respectively, after a 5 sec treatment time, and were shown to be below the limit of detection <0.22 log10 CFU-mL following 30 sec exposure to HILP 106.2 J-cm

. These studies demonstrate the bactericidal efficacy of alternative nonthermal light technologies and their potential as decontamination strategies in the food industry.

Autor: Angeliki Birmpa, Apostolos Vantarakis, Spyros Paparrodopoulos, Paul Whyte, and James Lyng

Fuente: https://www.hindawi.com/


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