Abstract
A multiplex PCR and DNA array for quick detection of Bacillus cereus, Staphylococcus aureus, Listeria monocytogenes, Escherichia coli O157:H7, and Salmonella spp. was developed using specific genetic markers derived from virulence-related genes. The genetic markers of cytK, sei, prfA, rfB, and hilA gene specifically amplified DNA fragments of 320 bp, 500 bp, 700 bp, 1.0 kb and 1.2 kb from B. cereus, S. aureus, L. monocytogenes, E. coli O157:H7, and Salmonella spp., respectively. These markers are specific for the detection of the corresponding target pathogens. The sensitivity of the genetic markers was down to ∼0.5 fg genomic DNA and ∼101 CFU/ml (one bacterial cell per reaction) of bacterial culture. The combination of mPCR and DNA macroarray hybridization sensitively and specifically detected B. cereus, S. aureus, L. monocytogenes, E. coli O157:H7, and Salmonella spp., in complex mixed cultures and food matrices. Thus, this mPCR and macroarray-based approach serves as rapid and reliable diagnostic tool for the detection of these five pathogens.
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This work was supported by a grant provided by EFAP Safety Center and Kangwon National University, Republic of Korea.
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Shree Prasad Thapa and Ah Reum Han contributed equally to this study.
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Thapa, S.P., Han, A.R., Cho, J.M. et al. Multiplex PCR and DNA array for the detection of Bacillus cereus, Staphylococcus aureus, Listeria monocytogenes, Escherichia coli O157:H7, and Salmonella spp. targeting virulence-related genes. Ann Microbiol 63, 725–731 (2013). https://doi.org/10.1007/s13213-012-0526-4
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DOI: https://doi.org/10.1007/s13213-012-0526-4