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Response surface methodology to design a selective enrichment broth for rapid detection of Salmonella spp. by SYBR Green I (TM) real-time PCR

文献类型： 外文期刊

作者： Zhang, Qiaoyan 1 ; Chen, Tingting 2 ; Yang, Shengli 2 ; Wang, Xiaofu 1 ; Guo, Hui 2 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Qual & Stand Agroprod, Zhejiang Prov Key Lab Food Safety, Hangzhou 310021, Zhejiang, Peoples R China

2.Zhejiang Univ Technol, Coll Pharmaceut Sci, Hangzhou 310014, Zhejiang, Peoples R China

关键词： Response surface methodology;Selective enrichment broth;SYBR Green I real-time PCR;Salmonella spp.;Inhibitor;Acarbose

期刊名称：APPLIED MICROBIOLOGY AND BIOTECHNOLOGY （ 影响因子：4.813； 五年影响因子：4.697 ）

ISSN： 0175-7598

年卷期： 2013 年 97 卷 9 期

页码：

收录情况： SCI

摘要： In order to meet dominant growth of Salmonella spp. in a composed system of five pathogens for accurate detection, designing an appropriate selective enrichment broth was clearly needed. First, we built a high-throughput assay procedure based on SYBR Green I (TM) real-time PCR, which possessed the necessary specificity for Salmonella spp., a good linear standard curve with typical R (2) value (0.9984) and high amplification efficiency (99.0 %). Further, for the larger target biomass in the mixed microflora, acarbose, LiCl and bile salt were selected to optimize their concentrations using response surface methodology (RSM). A central composite design was employed to collect the data and fit the response. A quadratic polynomial model was derived by computer simulation. Statistical analysis was carried out to explore the action and interaction of the variables on the response. In the end, a novel broth (Sal-5) was formulated to allow the efficient enrichment of Salmonella spp. and inhibit the growth of other tested strains. A detection platform was developed, including selective enrichment in Sal-5, DNA extraction by the boiling lysis method and real-time PCR test based on SYBR Green I (TM). This work could extend the application of RSM and real-time PCR in the design of other selective enrichment media for common pathogens.

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