A Flexible, Quantitative Plasmonic-Fluor Lateral Flow Assay for the Rapid Detection of Orthoebolavirus zairense and Orthoebolavirus sudanense

Abraham J. Qavi, Qisheng Jiang, M. Javad Aman, Hong Vu, Larry Zetlin, John M. Dye, Jeffrey W. Froude, Daisy W. Leung, Frederick Holtsberg, Scott L. Crick, Gaya K. Amarasinghe

Research output: Contribution to journalArticlepeer-review

Abstract

Filoviruses comprise a family of single-stranded, negative-sense RNA viruses with a significant impact on human health. Given the risk for disease outbreaks, as highlighted by the recent outbreaks across Africa, there is an unmet need for flexible diagnostic technologies that can be deployed in resource-limited settings. Herein, we highlight the use of plasmonic-fluor lateral flow assays (PF-LFA) for the rapid, quantitative detection of an Ebolavirus-secreted glycoprotein, a marker for infection. Plasmonic fluors are a class of ultrabright reporter molecules that combine engineered nanorods with conventional fluorophores, resulting in improved analytical sensitivity. We have developed a PF-LFA for Orthoebolavirus zairense (EBOV) and Orthoebolavirus sudanense (SUDV) that provides estimated limits of detection as low as 0.446 and 0.641 ng/mL, respectively. Furthermore, our assay highlights a high degree of specificity between the two viral species while also maintaining a turnaround time as short as 30 min. To highlight the utility of our PF-LFA, we demonstrate the detection of EBOV infection in non-human primates. Our PF-LFA represents an enormous step forward in the development of a robust, field-deployable assay for filoviruses.

Original languageEnglish
Pages (from-to)57-63
Number of pages7
JournalACS Infectious Diseases
Volume10
Issue number1
DOIs
StatePublished - Jan 12 2024

Keywords

  • Filoviruses
  • diagnostics
  • lateral flow assay
  • plasmonics

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