Virulence characterization and genotypic analyses of Listeria monocytogenes isolates from food and processing environments in eastern China.

Virulence characterization and genotypic analyses of Listeria monocytogenes isolates from food and processing environments in eastern China. Research Abstract Details 

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Virulence characterization and genotypic analyses of Listeria monocytogenes isolates from food and processing environments in eastern China. Abstract Text:

Lingli Jiang,Jianshun Chen,Jingjing Xu,Xiaofeng Zhang,Shuna Wang,Huancan Zhao,Khamphouth Vongxay,Weihuan Fang,

In this study, twenty L. monocytogenes food-related isolates collected from eastern China Zhejiang province were compared by in vivo LD(50) assays as well as in vitro cytopathic plaque forming assay. Nineteen L. monocytogenes isolates (19/20) were as virulent as reference strain 10403S, while the isolate M4 had low pathogenicity. The unique isolate M4 fell into lineage III based on the partial nucleotide variations of actA, while the other isolates belonged to the more common lineages I and II. L. monocytogenes isolates were grouped in 17 to 19 subtypes using pulsed-field gel electrophoresis (PFGE) with SmaI digestion, and multilocus sequence typing (MLST) based on three virulence genes (actA, inlA and inlB) and four housekeeping genes (betL, dat, recA and sigB). The virulence genes based MLST had better discriminatory power than that targeting the housekeeping genes (0.990 vs 0.895), similar to PFGE (0.976). An isolate from the processing desk was found having the same pulsotype as the two isolates from final shrimp products in the same plant, indicating that process contamination could be the source of Listeria contamination.

Virulence characterization and genotypic analyses of Listeria monocytogenes isolates from food and processing environments in eastern China. Publishing Authors By Initials

L Jiang,J Chen,J Xu,X Zhang,S Wang,H Zhao,K Vongxay,W Fang,

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Virulence characterization and genotypic analyses of Listeria monocytogenes isolates from food and processing environments in eastern China. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: International journal of food microbiology

VOLUME: 121

Page Numbers: 53-9

Journal Abbreviation: Int. J. Food Microbiol.

ISSN: 0168-1605

DAY: 1

MONTH: 11

YEAR: 2007

Virulence characterization and genotypic analyses of Listeria monocytogenes isolates from food and processing environments in eastern China. Information

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LANGUAGE: eng

NlmUniqueID: 8412849

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Grant and Affiliation Information for Virulence characterization and genotypic analyses of Listeria monocytogenes isolates from food and processing environments in eastern China.

AFFILIATION: Zhejiang University Institute of Preventive Veterinary Medicine, Zhejiang University and Zhejiang Provincial Key Laboratory for Preventive Veterinary Medicine, 268 Kaixuan Road, Hangzhou, Zhejiang 310029, PR China.

Country: Netherlands

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MEDLINETA: Int J Food Microbiol

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