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Reducing Campylobacter jejuni, Enterobacteriaceae and total aerobic bacteria on transport crates for chickens by irradiation with 265-nm ultraviolet light (UV-C LED)

Moazzami, Madeleine and Fernström, Lise-Lotte and Hansson, Ingrid (2021). Reducing Campylobacter jejuni, Enterobacteriaceae and total aerobic bacteria on transport crates for chickens by irradiation with 265-nm ultraviolet light (UV-C LED). Food Control. 119 , 107424
[Journal article]

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Abstract

It is critical to maintain low levels of microbes in the whole food production chain. Due to high speed of slaughter, lack of time, and structural characteristics of crates, sufficient cleaning and disinfection of crates used for transporting chickens to abattoirs is a challenge. Inadequately cleaned transport crates for broiler chickens caused a major outbreak of campylobacteriosis in Sweden in 2016-2017, when the contaminated crates in-troduced Campylobacter to the chickens during thinning. This study evaluated the antibacterial efficacy of 265nm ultraviolet (UV-C) LED light on artificially contaminated chicken transport crates. In a laboratory study, a transport crate artificially contaminated with Campylobacter and cecum contents was irradiated with 265-nm UV-C light by a continuous LED array in a treatment cabinet. The transport crate was sampled 52 times by cotton swabs before and after UV-C treatment for 1 min (20.4 mJ/cm2) and 3 min (61.2 mJ/cm2). The swab samples were analysed for Campylobacter jejuni (C. jejuni), bacteria belonging to the family Enterobacteriaceae, and total aerobic bacteria. After irradiation with UV-C LED light for 1 min, a mean reduction in C. jejuni of log 2.0 +/- 0.5 CFU/mL was observed, while after irradiation for 3 min the reduction was log 3.1 +/- 1.0 CFU/mL. The mean reduction in Enterobacteriaceae was log 1.5 +/- 0.3 CFU/mL after 1 min of irradiation and log 1.8 +/- 0.8 CFU/mL after 3 min. The mean reduction in total aerobic bacteria was log 1.4 +/- 0.4 CFU/mL after 1 min of irradiation and log 1.6 +/- 0.5 CFU/mL after 3 min. Significant reductions in bacterial load were observed in all samples after UV-C treatment and extending the treatment time from 1 to 3 min significantly increased the reduction in C. jejuni. However, before implementation of UV-C LED treatment in commercial chicken abattoirs, the irradiation unit would need to be extended and/or the washing procedure before UV-C treatment, to reduce the amount of organic matter on transport crates, would need to be improved.

Authors/Creators:Moazzami, Madeleine and Fernström, Lise-Lotte and Hansson, Ingrid
Title:Reducing Campylobacter jejuni, Enterobacteriaceae and total aerobic bacteria on transport crates for chickens by irradiation with 265-nm ultraviolet light (UV-C LED)
Year of publishing :2021
Volume:119
Article number:107424
Number of Pages:6
Publisher:ELSEVIER SCI LTD
ISSN:0956-7135
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Food Science
Keywords:Ultraviolet light, Campylobacter, Enterobacteriaceae, Total aerobic bacteria, Transport crate
URN:NBN:urn:nbn:se:slu:epsilon-p-109380
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-109380
Additional ID:
Type of IDID
DOI10.1016/j.foodcont.2020.107424
Web of Science (WoS)000584386500003
ID Code:19779
Faculty:VH - Faculty of Veterinary Medicine and Animal Science
Department:(VH) > Department of Biomedical Science and Veterinary Public Health
Deposited By: SLUpub Connector
Deposited On:28 Dec 2020 10:23
Metadata Last Modified:28 Dec 2020 10:31

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