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. 2018 Oct 31;8:16109. doi: 10.1038/s41598-018-33972-0

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Impedance response for different concentrations of Salmonella. The sensor was first functionalized with crosslinked Salmonella antibody type B, D and E. Salmonella serotype B with concentrations of (a) 109, (b) 70, (c) 41, (d) 20, (e) 12, (f) 8 Cells/ml, spiked with ready-to-eat turkey sample was then delivered to the sensor for detection. The limit of detection was found to be 8 Cell/ml. (g) shows the variation of impedance change is directly proportional (linear) to bacterial cell concentration. The linear correlation coefficient is 0.955 and the sensitivity (Slope) is 0.02 MΩ per bacteria concentration decade. Ab stands for antibody, Ag stands for antigen.