Assessment of probiotic adhesion and inhibitory effect on Escherichia coli and Salmonella adhesion

文献类型： 外文期刊

第一作者： Wang, Ya

作者： Wang, Ya;Jia, Dan;Wang, Jia-hui;Jia, Dan;Wang, Jia-hui;Li, He-hai;Liu, Jun-long;Liu, Ai-hong;Wang, Jin-ming;Guan, Gui-quan;Luo, Jian-xun;Yin, Hong;Li, You-quan

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关键词： Probiotic; Intestinal infection; Antimicrobial activity; Cell-surface property; Adhesion

期刊名称：ARCHIVES OF MICROBIOLOGY （ 影响因子：2.552； 五年影响因子：2.475 ）

ISSN： 0302-8933

年卷期： 2021 年 203 卷 10 期

页码：

收录情况： SCI

摘要： In this study, we screened bacterial strains to identify specific probiotics to treat pig diarrhea caused by Escherichia coli or Salmonella. The potential probiotics were assayed for their survival in gastrointestinal solution, their antimicrobial activity, cell-surface properties, adhesion to Caco-2 cells, and inhibition of pathogen adhesion. Nine out of the 20 strains tested showed high tolerance of a simulated gastrointestinal environment and six strains exerted antagonistic effects against enterohemorrhagic E. coli (EHEC) O157:H7 and Salmonella Typhimurium MQ. Lactobacillus johnsonii pDX1e exhibited a higher potent antibacterial activity. Four strains (pDX1a, pDX1e, pDX3a, and pDX5a) displayed auto-aggregation, hydrophobicity, and adhesion to Caco-2 cells similar to those of the reference strain Lacticaseibacillus rhamnosus GG (LGG). Enterococcus durans pDX5a showed the highest adhesion capacity (13.86%), followed by the reference strain LGG (11.20%). All the tested strains competitively suppressed the attachment of pathogens to Caco-2 cells (by 30.73-55.18%); L. johnsonii pDX1e and Ent. durans pDX5a significantly inhibited the adhesion of pathogens by substitution and exclusion, respectively. Therefore, pDX1e and pDX5a were selected as probiotic strains for further investigation and application.

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