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RESEARCH PRODUCT

Suitability of two rapid lateral flow immunochromatographic assays for predicting SARS‐CoV‐2 neutralizing activity of sera

David NavarroLorena ForquéClara Francés-gómezVictor LatorreIgnacio TorresRon GellerJosep FerrerJesús Rodríguez-díazArantxa ValdiviaCarlos Solano De La AsunciónDixie HuntleyEstela GiménezRoberto Gozalbo-roviraJavier BuesaRosa Costa

subject

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)Green Fluorescent ProteinsAntibodies ViralNeutralizing antibodiesNeutralizationSARS‐CoV‐2Green fluorescent protein03 medical and health sciencesCOVID-19 Testing0302 clinical medicineCOVID‐19VirologyLateral flow 16 immunochromatographic assaysHumansMedicineImmunochromatographic Assays030212 general & internal medicineNeutralizing antibodyResearch ArticlesImmunoassaybiologybusiness.industrySARS-CoV-2COVID-19biology.organism_classificationAntibodies NeutralizingVirologyTiterInfectious DiseasesImmunoglobulin MVesicular stomatitis virusImmunoglobulin GSpike Glycoprotein Coronavirusbiology.proteinlateral flow immunochromatographic assays030211 gastroenterology & hepatologyLteral flow immunochromatographic assaysAntibodybusinessResearch Article

description

Purpose: Assessment of commercial SARS-CoV-2 immunoassays for their capacity to provide reliable information on sera neutralizing activity is an emerging need. We evaluated the performance of two commercially-available lateral flow immunochromatographic assays (LFIC) (Wondfo SARS-CoV-2 Antibody test and the INNOVITA 2019-nCoV Ab test) in comparison with a SARS-CoV-2 neutralization pseudotyped assay for COVID-19 diagnosis in hospitalized patients, and investigate whether the intensity of the test band in LFIC associates with neutralizing antibody (NtAb) titers. Patients and Methods: Ninety sera were included from 51 patients with moderate to severe COVID-19. A green fluorescent protein (GFP) reporter-based pseudotyped neutralization assay (vesicular stomatitis virus coated with SARS-CoV-2 spike protein) was used. Test line intensity was scored using a 4-level scale (0 to 3+). Results: Overall sensitivity of LFIC assays was 91.1% for the Wondfo SARS-CoV-2 Antibody test, 72.2% for the INNOVITA 2019-nCoV IgG, 85.6% for the INNOVITA 2019-nCoV IgM and 92.2% for the NtAb assay. Sensitivity increased for all assays in sera collected beyond day 14 after symptoms onset (93.9%, 79.6%,93.9% and 93.9%, respectively). Reactivities equal to or more intense than the positive control line (≥2+) in the Wondfo assay had a negative predictive value of 100% and a positive predictive value of 96.4% for high NtAb50 titers (≥1/160). Conclusions: Our findings support the use of LFIC assays evaluated herein, particularly the Wondfo test, for COVID-19 diagnosis. We also find evidence that these rapid immunoassays can be used to predict high SARS-CoV-2-S NtAb50 titers.

yearjournalcountryeditionlanguage
2020-12-17
10.1002/jmv.26697http://hdl.handle.net/10261/224725