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A Peptide-Based Magnetic Chemiluminescence Enzyme Immunoassay for Serological Diagnosis of Coronavirus Disease 2019 #MMPMID32382737
Cai XF; Chen J; Li Hu J; Long QX; Deng HJ; Liu P; Fan K; Liao P; Liu BZ; Wu GC; Chen YK; Li ZJ; Wang K; Zhang XL; Tian WG; Xiang JL; Du HX; Wang J; Hu Y; Tang N; Lin Y; Ren JH; Huang LY; Wei J; Gan CY; Chen YM; Gao QZ; Chen AM; He CL; Wang DX; Hu P; Zhou FC; Huang AL; Wang DQ
J Infect Dis 2020[Jun]; 222 (2): 189-193 PMID32382737show ga
BACKGROUND: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), a novel beta-coronavirus, causes severe pneumonia and has spread throughout the globe rapidly. The disease associated with SARS-CoV-2 infection is named coronavirus disease 2019 (COVID-19). To date, real-time reverse-transcription polymerase chain reaction (RT-PCR) is the only test able to confirm this infection. However, the accuracy of RT-PCR depends on several factors; variations in these factors might significantly lower the sensitivity of detection. METHODS: In this study, we developed a peptide-based luminescent immunoassay that detected immunoglobulin (Ig)G and IgM. The assay cutoff value was determined by evaluating the sera from healthy and infected patients for pathogens other than SARS-CoV-2. RESULTS: To evaluate assay performance, we detected IgG and IgM in the sera from confirmed patients. The positive rate of IgG and IgM was 71.4% and 57.2%, respectively. CONCLUSIONS: Therefore, combining our immunoassay with real-time RT-PCR might enhance the diagnostic accuracy of COVID-19.