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Issue 17, 2019
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An electrochemical scaffold sensor for rapid syphilis diagnosis

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Abstract

The faster a disease can be diagnosed, the sooner effective treatment can be initiated, motivating a drive to replace standard laboratory techniques with point-of-care technologies that return answers in minutes rather than hours. Thus motivated, we describe the development of an E-DNA scaffold sensor for the rapid and convenient measurement of antibodies diagnostic of syphilis. To achieve this (and in contrast to previous sensors of this class, which relied on single, linear epitopes for detection), we utilized a near full-length antigen as the sensor's recognition element, allowing us to simultaneously display multiple epitopes. The resultant sensor is able to detect antibodies against Treponema pallidum pallidum, the causative agent of syphilis, at clinically relevant concentrations in samples in less than 10 min. Preliminary results obtained using sero-positive and sero-negative human samples suggest the clinical sensitivity and specificity of the approach compare well to current gold-standard tests, while being simple and rapid enough to deploy at the point of care.

Graphical abstract: An electrochemical scaffold sensor for rapid syphilis diagnosis

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Publication details

The article was received on 11 Mar 2019, accepted on 27 May 2019 and first published on 03 Jun 2019


Article type: Paper
DOI: 10.1039/C9AN00455F
Analyst, 2019,144, 5277-5283

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    An electrochemical scaffold sensor for rapid syphilis diagnosis

    N. E. Ogden, M. Kurnik, C. Parolo and K. W. Plaxco, Analyst, 2019, 144, 5277
    DOI: 10.1039/C9AN00455F

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