Detection of Salmonella spp. by a loop-mediated isothermal amplification (LAMP) method targeting bcfD gene

作者：Zhuang, L.; Gong, J.; Li, Q.; Zhu, C.; Yu, Y.; Dou, X.; Liu, X.; Xu, B.; Wang, C.^*

来源：Letters in Applied Microbiology, 2014, 59(6): 658-664.

DOI：10.1111/lam.12328

• bcfD gene
• detection
• loop-mediated isothermal amplification
• PCR
• Salmonella

In this study, we developed and validated a loop-mediated isothermal amplification (LAMP) assay for Salmonella detection targeting bcfD gene, a conserved fimbrial operon gene existing in Salmonella. The Salmonella LAMP assay we developed successfully amplified 44 Salmonella strains (14 standard strains and 30 clinical isolates), but none of 9 non-Salmonella standard strains (Proteus mirabilis, Listeria monocytogenes, Escherichia coli, Pseudomonas aeruginosa, Shigella flexneri, Shigella sonnei, Klebsiella pneumoniae, Campylobacter jejuni and Vibrio parahemolyticus). The detection limit was 5 CFU of Salmonella pure culture or 200 CFU of artificially spiked faeces per reaction system (equivalent to 5000 CFUg(-1) of faeces), and this method could directly detect Salmonella in chicken faeces free of pre-enrichment in a reaction time of 25min. Our experiments show that the LAMP method we developed is a rapid, sensitive, specific and practical method for Salmonella detection. The Salmonella LAMP assay can potentially serve as new on-site diagnostics in the food and agricultural industries.

• 出版日期2014-12
• 单位江苏省家禽科学研究所; 扬州大学