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Prevalence Analysis and Molecular Characterization of Salmonella at Different Processing Steps in Broiler Slaughter Plants in South Korea
Author(s) -
Park HyunJung,
Chon JungWhan,
Lim JongSoo,
Seo KunHo,
Kim YoungJo,
Heo EunJeong,
Wee SungHwan,
Sung Kidon,
Moon JinSan
Publication year - 2015
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/1750-3841.13106
Subject(s) - salmonella , broiler , serotype , salmonella enteritidis , biology , veterinary medicine , feces , evisceration (ophthalmology) , poultry farming , zoology , microbiology and biotechnology , medicine , bacteria , genetics , alternative medicine , pathology
In this study, changes in the prevalence of Salmonella during the processing of broiler chicken carcasses were investigated. A total of 1040 fecal swabs and chicken carcasses samples were collected from 2 processing plants at the 4 stages of broiler processing, which included live birds in slaughter line, postevisceration/prewashing, postwashing/prechilling, and postchilling, respectively. The intraspecific biodiversity of the Salmonella isolates was determined using a DiversiLab automated repetitive sequence‐based PCR (rep‐PCR) system. In both plants, the prevalence of Salmonella increased considerably after evisceration (from 4.6% to 30.8%, P < 0.05) and decreased after washing (from 30.8% to 25.4%, P < 0.05). However, the chilling step had little effect on Salmonella prevalence (from 25.4% to 22.7%, P > 0.05). The most frequent Salmonella serovar in plant A was Infantis (35.8%), followed by Enteritidis (26.2%) and Montevideo (15.0%), while Montevideo (43.6%) and Enteritidis (35.9%) were most prevalent in plant B. A difference in the rep‐PCR banding pattern was found to be related to the processing plant origin and serovar rather than sampling point or sampling day, although there were some exceptional strains.