Syracuse

A Field-Deployable Reverse Transcription Recombinase Polymerase Amplification Assay for Rapid Detection of the Chikungunya Virus

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Patel, Pranav | Abd El Wahed, Ahmed | Faye, Oumar | Prüger, Pauline | Kaiser, Marco | Thaloengsok, Sasikanya | Ubol, Sukathida | Sakuntabhai, Anavaj | Leparc-Goffart, Isabelle | Hufert, Frank, T | Sall, Amadou, A | Weidmann, Manfred | Niedrig, Matthias

Edité par CCSD ; Public Library of Science -

International audience. BACKGROUND:Chikungunya virus (CHIKV) is a mosquito-borne virus currently transmitted in about 60 countries. CHIKV causes acute flu-like symptoms and in many cases prolonged musculoskeletal and joint pain. Detection of the infection is mostly done using RT-RCR or ELISA, which are not suitable for point-of-care diagnosis.METHODOLOGY/PRINCIPAL FINDINGS:In this study, a reverse transcription recombinase polymerase amplification (RT-RPA) assay for the detection of the CHIKV was developed. The assay sensitivity, specificity, and cross-reactivity were tested. CHIKV RT-RPA assay detected down to 80 genome copies/reaction in a maximum of 15 minutes. It successfully identified 18 isolates representing the three CHIKV genotypes. No cross-reactivity was detected to other alphaviruses and arboviruses except O'nyong'nyong virus, which could be differentiated by a modified RPA primer pair. Seventy-eight samples were screened both by RT-RPA and real-time RT-PCR. The diagnostic sensitivity and specificity of the CHIKV RT-RPA assay were determined at 100%.CONCLUSIONS/SIGNIFICANCE:The developed RT-RPA assay represents a promising method for the molecular detection of CHIKV at point of need.

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