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Zeng, Yongbin; Lin, Caorui; Liu, Can; Huang, Chun; Chen, Falin; Cao, Yingping; Wu, Siying; Wei, Donghong; Lin, Zhong; Zhang, Yali; Zhang, Ling; Teng, Jing; Li, Zishun; Hong, Guolin; Yang, Tianci; Ye, Huiming; Tu, Haijian; Xiao, Yupeng; Huang, Lishan; Zhang, Jiawei; Chen, Tianbin; Li, Jinming; Ji, Fusui; Ou, Qishui
Clinica chimica acta, 01/2023, Volume: 539Journal Article
•In this work, We used the pseudoviruses and euvirus neutralization assay to evaluate the value of anti-SARS-CoV-2 antibody tests in a population of 10776 close contacts in the Delta variant epidemic of Fujian. And the results showed that neutralizing antibodies detected by Wantai bio. or Yahuilong bio. can get the level of 0.93 or 0.82 in correlation with euvirus neutralization assay. The findings of this study demonstrate that the detections of antibodies have profound value in the diagnosis of COVID-19. Nucleic acid detection represents limitations due to its false-negative rate and technical complexity in the COVID-19 pandemic. Anti-severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antibody tests are widely spread all over the world presently. However, there is no report on the effectiveness of anti-SARS-CoV-2 antibody testing methods in China. We gathered 10776 serum samples from close contacts of the SARS-CoV-2 infections in Fujian of China and used 2 chemiluminescence immunoassays (Wantai Bio., Yahuilong Bio.) and 2 lateral flow immunoassays (Lizhu Bio. and Dongfang Bio.) to perform the anti-SARS-CoV-2 antibody tests in China. The 4 antibody tests have great diagnostic value for infected or uninfected, especially in the neutralizing antibodies tests, the AUC can reach 0.939 (Wantai Bio.) and 0.916 (Yahuilong Bio.). Furthermore, we used pseudoviruses and euvirus neutralization assay to validate the effectiveness of these antibody test, the results of pseudoviruses neutralization assay or euvirus neutralization assay shows a considerable correlation with the 4 antibody detection respectively, particularly in euvirus neutralization assay, neutralizing antibodies detected by Wantai Bio. or Yahuilong Bio., the correlation can get the level of 0.93 or 0.82. The findings of this study demonstrate that the detections of antibodies have profound value in the diagnosis of COVID-19.
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