Multiplex PCR for simultaneous detection of Salmonella spp., Listeria monocytogenes, and Escherichia coli O157:H7 in meat samples |
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Authors: | Kawasaki Susumu Horikoshi Naoko Okada Yukio Takeshita Kazuko Sameshima Takashi Kawamoto Shinichi |
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Affiliation: | National Food Research Institute, Food Hygiene Team, Kannondai-2-1-12, Tsukuba 305-8642, Japan. skawasa@nfri.affrc.go.jp |
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Abstract: | A multiplex PCR method was developed for simultaneous detection of Salmonella spp., Listeria monocytogenes, and Escherichia coli O157:H7 in meat samples. DNA detection sensitivity for this method was 10(3) CFU/ml for each pathogen. When this protocol was used for the detection of each of the above pathogenic bacteria in spiked pork samples, 1 cell per 25 g of inoculated sample could be detected within 30 h. In the samples of naturally contaminated meat, Salmonella spp., L. monocytogenes, and E. coli O157:H7 were detected over the same time period. Excellent agreement was obtained for the results of multiplex PCR and the conventional culture method, which suggests that the multiplex PCR is a reliable and useful method for rapid screening of meat products for Salmonella spp., L. monocytogenes, and E. coli O157:H7 contamination. |
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