Abstract
Diarrheagenic Escherichia coli (DEC) is a group of important foodborne pathogens that can spread and cause infection in humans. As a significant public health issue, DEC infection may lead to a series of diseases such as abdominal pain, diarrhea, hemorrhagic colitis, and hemolytic uremic syndrome. Therefore, its rapid and accurate detection has become an important concern for food safety issues and healthcare-associated infections. We have developed a multiplex real-time quantitative PCR assay (qPCR), DEC Sensor Test, to simultaneously recognize 5 major DEC pathotypes in a single tube, enterotoxigenic, enterohemorrhagic, enteropathogenic, enteroaggregative and enteroinvasive E. coli. In this assay, 13 DEC virulence genes, stp, sth, lt, stx1, stx2, eae, escV, bfpB, aggR, astA, pic, invE, and ipaH, can be simultaneously detected along with a spiked-in internal amplification control to avoid false negative results. All the constituent PCR for the 13 DEC virulence genes had high analytical sensitivity and specificity. Detection of all virulence genes by DEC Sensor Test can be much easier, cheaper and faster to perform than conventional tests. It also has added advantages of being able to distinguish live or dead bacteria as well as eliminating the possibility of switching partial results between different samples associated with multi-tube tests. Therefore, the application of this assay may significantly enhance our ability to prevent and fight DEC-associated diseases and to improve public health.
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Funding
This work was supported by “Hundred Talents Program” of Chinese Academy of Sciences (Grant no. Y421021102, Grant no. Y521051102), Key Technologies R & D Program for Social Development of Jiangsu Province (Grant no. BE2016685, Grant no. BE2015645), Suzhou Leading Talent Project (Grant no. ZXL2014128), New Medical Devices and Pharmaceuticals Fund of Suzhou (Grant no. ZXY201430).
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J. Sun, Y. Shi, M. Zheng, Y. Ma, and G. Zhao contributed to the conception and design of the study. J. Sun, Y. Shi, Y. Du, Z. Wang, Z. Liu, and H. Wang performed the experiments. J. Sun, Y. Shi, and Y. Du analyzed the data and performed the statistical analysis. J. Sun, M. Zheng, Y. Ma, and G. Zhao wrote this manuscript. All authors approved the manuscript submitted.
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The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interests. This article does not contain any studies involving animals or human participants performed by any of the authors.
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Sun, J., Shi, Y., Du, Y. et al. Rapid Detection of Diarrheagenic Escherichia coli by a New Multiplex Real-Time Quantitative PCR Assay. Appl Biochem Microbiol 56, 748–757 (2020). https://doi.org/10.1134/S0003683820060174
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DOI: https://doi.org/10.1134/S0003683820060174