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Analysis of drug sensitivity of Escherichia Coli O157H7

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Abstract

Sensitive and rapid tests of Escherichia coli drug sensitivity is very important for health of human and animals. An E. coli immunosensor was built based on electrochemical detection and immune detection technologies, through pretreating screen-printed electrodes, and analyzing the optimal reaction concentration of antigen antibody binding with the AC impedance method. Based on the detection system combining the immunosensor and electrochemical workstation, tests were carried out to measure the accuracy of E. coli concentration and drug sensitivity, and error of the detection system was calibrated in accordance with data from the electrochemical workstation. E. coli O157:H7 can be detected in the range of 103 cfu/ml ~ 1012 cfu/ml, and the detection error controlled within 5%. Results from the electrochemical workstation and those from the detection device were consistent, and both demonstrated a greater inhibitory effect of antibiotics on E. coli than on Bacillus subtilis. The electrochemical detection system is highly efficient and accurate, and could be widely applied to E. coli drug sensitivity tests in clinical medicine.

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Funding

The research is supported by the National Natural Science Foundation of China (Grant No. 31772651), Shanxi Foundation for Science and Technology Activities of Returned Students, Central government’s grant to the Shanxi province for local science and technology projects.

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In this article, the author’s contributions are shown below: Methodology, Z.L.; writing—original draft preparation, M.X. and R.Z.; project administration, Z.L.; data curation, Z.Y., H.Z., Y.S., X.S., Y.G., and H.Y. helped to analyze the data. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Zhenyu Liu.

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Xu, M., Liu, Z., Song, Y. et al. Analysis of drug sensitivity of Escherichia Coli O157H7. Biomed Microdevices 23, 29 (2021). https://doi.org/10.1007/s10544-021-00565-0

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