Comparison of intense pulsed light- and ultraviolet (UVC)-induced cell damage in Listeria monocytogenes and Escherichia coli O157:H7
- Authors
- Cheigh, Chan-Ick; Park, Mi-Hyun; Chung, Myong-Soo; Shin, Jung-Kue; Park, Young-Seo
- Issue Date
- Jun-2012
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Intense pulsed light (IPL); UVC; Listeria monocytogenes; Escherichia coli O157:H7; Cell damage
- Citation
- FOOD CONTROL, v.25, no.2, pp.654 - 659
- Journal Title
- FOOD CONTROL
- Volume
- 25
- Number
- 2
- Start Page
- 654
- End Page
- 659
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/16350
- DOI
- 10.1016/j.foodcont.2011.11.032
- ISSN
- 0956-7135
- Abstract
- The purpose of this study was to compare the degree of microbial inactivation and cell damage induced by intense pulsed light (IPL) and short-wavelength ultraviolet (UVC) in Listeria monocytogenes and Escherichia coli O157:H7. The viability of the food-borne pathogens treated with IPL and UVC (254 nm) decreased exponentially with treatment time. Particularly dramatic reductions in L monocytogenes and E. coli O157:H7 were observed for IPL treatments at energy densities of 376 and 455 W/m(2), with an approximately 7-log reduction for a treatment time of 60-180 s. Also, a 4-fog reduction of L monocytogenes and a 5-log reduction of E. coli O157:H7 were achieved with UVC irradiation for 1200 s. The types and amounts of IPL- and UVC-induced DNA damage in both microorganisms were determined and compared. DNAs from cells irradiated with either IPL or UVC accumulated double-strand breaks (DSBs), single-strand breaks, and cyclobutane pyrimidine dimers, and with a similar pattern: however, more DSBs were detected following UVC than following IPL in both types of microorganism. Transmission electron microscopy observations of IPL- and UVC-induced cell damage clearly indicate that bacterial cell structures were destroyed by IPL treatment but not by UVC treatment. (C) 2011 Elsevier Ltd. All rights reserved.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - 바이오나노대학 > 식품생물공학과 > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.