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Detection of Salmonella enteritidis and Salmonella typhimurium in foods using a rapid, multiplex real-time recombinase polymerase amplification assay

文献类型: 外文期刊

作者: Ren, Junan 1 ; Man, Yan 2 ; Li, An 2 ; Liang, Gang 2 ; Jin, Xinxin 2 ; Pan, Ligang 2 ;

作者机构: 1.Beijing Food & Wine Inspect & Testing Stn, Beijing, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Beijing Res Ctr Agr Stand & Testing, Beijing 100097, Peoples R China

3.Minist Agr, Risk Assessment Lab Agro Prod Beijing, Beijing, Peoples R China

期刊名称:JOURNAL OF FOOD SAFETY ( 影响因子:1.953; 五年影响因子:1.946 )

ISSN: 0149-6085

年卷期:

页码:

收录情况: SCI

摘要: Salmonella has been recognized as a major foodborne pathogen for humans and animals. In this study, a multiplex real-time recombinase polymerase amplification (RPA) was developed for simultaneous detection of Salmonella enterica serovars, Salmonella enteritidis and Salmonella typhimurium, from chicken, eggs, lettuce, and papaya. The reaction was performed for 20 min at 35 degrees C, and the detection limit of the assay was 10(2) CFU/ml for pure culture. In food application, the limit of detection (LOD) of S. enteritidis and S. typhimurium using multiplex real-time RPA without enrichment procedure was 10(2) CFU/25 g, respectively. After enrichment, the LOD of S. enteritidis and S. typhimurium was 10 CFU/25 g. Moreover, the result for Salmonella spp. was not significantly different from those obtained using a culture-based method. Additionally, the assay has a lower cross-reactivity with other pathogenic microorganisms and a good stability performance. Thus, the developed multiplex RPA assay could be used as a rapid tool for the detection of S. enteritidis and S. typhimurium in food.

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