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Characterization of Enterococcus durans 152 bacteriocins and their inhibition of Listeria monocytogenes in ham

文献类型: 外文期刊

作者: Du, Lihui 1 ; Liu, Fang 2 ; Zhao, Ping 3 ; Zhao, Tong 3 ; Doyle, Michael P. 3 ;

作者机构: 1.Nanjing Univ Finance & Econ, Collaborat Innovat Ctr Modern Grain Circulat & Sa, Key Lab Grains & Oils Qual Control & Proc, Coll Food Sci & Engn, Nanjing 210023, Jiangsu, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Agr Prod Proc, Nanjing 210014, Jiangsu, Peoples R China

3.Univ Georgia, Coll Agr & Environm Sci, Ctr Food Safety, 1109 Expt St, Griffin, GA 30223 USA

关键词: Bacteriocins;Enterococcus durans;Listeria monocytogenes;Ready-to-eat meat

期刊名称:FOOD MICROBIOLOGY ( 影响因子:5.516; 五年影响因子:5.68 )

ISSN:

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收录情况: SCI

摘要: ' Listeria monocytogenes is a nonfastidious, widely occurring foodborne pathogen that is a major challenge to the food industry. Enterococcus durans 152, a confirmed L. monocytogenes-control microorganism, was isolated from floor drain samples from a food processing facility. In this study, the two bacteriocins produced by E. durans 152 were characterized and identified as Dur 152A (an enterocin L50A derivative with two amino acid substitutions of I -> M) and enterocin L50B. The bacteriocins were then partially purified and evaluated for inhibitory activity to L. monocytogenes in deli ham. Results revealed that at 400 AU/ml, the bacteriocins prevented growth of listeria in deli ham for at least 10 weeks at 8 degrees C and at least 30 days at 15 degrees C. For comparison, 500 ppm Nisin controlled listeria growth for up to 6 weeks at 8 degrees C and up to 18 days at 15 degrees C. These findings reveal the potential for the bacteriocins of E. durans 152 to serve as anti-listerial agents in deli meat. (C) 2017 Elsevier Ltd. All rights reserved.

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