Gowri Manickam, Christine A Pillai, Nagarajan Thirunavukkarasu, Segaran P Pillai, Julie R Avila, David Hodge, Kevin Anderson, Shashi Sharma
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Evaluation of an Electrochemiluminescence Assay for the Rapid Detection of Ricin Toxin.
In this article, we detail a comprehensive laboratory evaluation of an immunoassay for the rapid detection of ricin using the Meso Scale Diagnostics Sector PR2 Model 1800. For the assay evaluation, we used inclusivity, exclusivity, and informational panels comprised of extracts of 35 near-neighbor plant cultivar-extracts, 66 lectins, 26 white powders, 16 closely related toxins and proteins/toxoids, and a pool of 30 BioWatch filter extracts. The results show that the Meso Scale Diagnostics ricin detection assay exhibits good sensitivity and specificity with a limit of detection of 1.2 ng/mL. However, the dynamic range of the assay for the quantitation of ricin was limited. We observed a hook effect at higher ricin concentrations, which can lead to potential false negative results. A modification of the assay protocol that incorporates extra wash steps can decrease the hook effect and the potential for false negative results.
期刊介绍：
Health Security is a peer-reviewed journal providing research and essential guidance for the protection of people’s health before and after epidemics or disasters and for ensuring that communities are resilient to major challenges. The Journal explores the issues posed by disease outbreaks and epidemics; natural disasters; biological, chemical, and nuclear accidents or deliberate threats; foodborne outbreaks; and other health emergencies. It offers important insight into how to develop the systems needed to meet these challenges. Taking an interdisciplinary approach, Health Security covers research, innovations, methods, challenges, and ethical and legal dilemmas facing scientific, military, and health organizations. The Journal is a key resource for practitioners in these fields, policymakers, scientific experts, and government officials.
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