Food and Fermentation Industries >

2019 , Vol. 45 >Issue 22: 32 - 38

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.021267

Environmental stress tolerance and safety evaluation of Enterococcus faecium R2 isolated from pickles

  • CHEN Zhina ,
  • PEI Jiliu ,
  • YE Tao ,
  • XUE Yongzhen ,
  • ZHAN Zhiqiang ,
  • LI Ya ,
  • LIU Tian
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  • 1 (College of Biological Engineering, Huainan Normal University, Huainan 232038, China)
    2 (Key Laboratory of Bioresource and Environmental Biotechnology of Anhui Higher Education Institutes, Huainan 232038, China)

Received date: 2019-06-03

  Online published: 2020-02-16

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Abstract

Enterococcus faecium R2, which can efficiently ferment bean curd water and produce acid, is a dominant acid-producing bacterium in the pickles fermentation process. It has been considered as a new acid slurry pure starter. In this study, the safety and the environmental tolerance of E. faecium R2 were evaluated. E. faecium R2 shown negative results on tests of virulence factors, resistance genes and harmful metabolites, as well as no hemolytic activity was detected. It exhibited tolerance to acidity, bilt salt and high osmotic pressure in external environments. Additionally, self-aggregation and hydrophobicity of E. faecium R2 were observed during the study. Therefore, E. faecium R2 can be considered as safe.

Key words： Enterococcus faecium; safty; virulence genes; vancomycin resistant genes; environmental stresses tolenrance

Cite this article

CHEN Zhina , PEI Jiliu , YE Tao , XUE Yongzhen , ZHAN Zhiqiang , LI Ya , LIU Tian . Environmental stress tolerance and safety evaluation of Enterococcus faecium R2 isolated from pickles[J]. Food and Fermentation Industries, 2019 , 45(22) : 32 -38 . DOI: 10.13995/j.cnki.11-1802/ts.021267

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