期刊
FOOD CONTROL
卷 51, 期 -, 页码 31-36出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodcont.2014.11.007
关键词
Multiplex real-time PCR; Raw shrimp; Vibrio parahaemolyticus; Listeria monocytogenes; Salmonella spp.
资金
- National Natural Science Foundation of China [31271870]
- project of Science and Technology Commission of Shanghai Municipality [14DZ1205100, 14320502100, 12391901300]
- Key Project of Shanghai Agriculture Prosperity through Science and Technology [3-5]
- Cross-Discipline Project [B5201120040]
- Biotechnology and Biological Sciences Research Council (BBSRC) of the UK
Vibrio parahaemolyticus, Listeria monocytogenes and Salmonella spp. are important pathogens contaminating seafood in China. In this study, we developed an efficient multiplex real-time PCR for the simultaneous detection of V. parahaemolyticus, L. monocytogenes and Salmonella spp. in raw shrimp without a prior enrichment step. In a test using 28 target and non-target strains only the targets were detected and two calibration curves, for pure cultures and artificially contaminated samples, were used to evaluate the efficiencies of this method. Amplification efficiencies of this multiplex real-time PCR were excellent in pure cultures and artificially contaminated shrimps. The limits of detection in artificially contaminated shrimps were 112 CFU/g for V. parahaemolyticus, 158 CFU/g for L monocytogenes and 103 CFU/g for Salmonella spp. We validated this multiplex real-time PCR method on 48 commercial samples and the results were comparable to standard culture methods. This efficient multiplex real-time PCR, where each test takes only 50 min after DNA extraction, is a useful tool for high-throughput surveillance of V. parahaemolyticus, L. monocytogenes and Salmonella spp. in seafood products. (C) 2014 Elsevier Ltd. All rights reserved.
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