Development and Evaluation of A Rapid Test for SARS-CoV-2 IgM/IgG Detection by Immunochromatography
Keywords:
SARS-CoV-2, Serological test, N-protein, Antibody detection, COVID-19 IgM/IgG Rapid testAbstract
The emerging of new coronavirus, SARS-CoV-2 causing COVID-19, is one of the worst pandemics in human. The viral RNA detection by using RT-PCR can indicate current and use for diagnosis of infection and case finding. Serological test can reveal previous infection and be used in multipurpose. In this study, we developed COVID-19 IgM/IgG rapid test for antibody detection in SARS-CoV-2 infection individuals. The developed test used recombinant N-protein of SARS-CoV-2 expressed in mammalian cells as gold-conjugated protein antigen and was assessed with 132 clinical samples. The results showed its sensitivity of 35.09%, 47.62% and 87.51% at 1-7, 8-14 and ≥ 15 days after onset, respectively and no cross-reactivity with other antibodies in various diseases from tested samples. In addition, the test has high specificity of 99.5%.
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