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10.1038/s41598-021-82428-5

http://scihub22266oqcxt.onion/10.1038/s41598-021-82428-5
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33531605!7854735!33531605
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suck abstract from ncbi


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pmid33531605      Sci+Rep 2021 ; 11 (1): 2776
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  • Time course of the sensitivity and specificity of anti-SARS-CoV-2 IgM and IgG antibodies for symptomatic COVID-19 in Japan #MMPMID33531605
  • Nakano Y; Kurano M; Morita Y; Shimura T; Yokoyama R; Qian C; Xia F; He F; Kishi Y; Okada J; Yoshikawa N; Nagura Y; Okazaki H; Moriya K; Seto Y; Kodama T; Yatomi Y
  • Sci Rep 2021[Feb]; 11 (1): 2776 PMID33531605show ga
  • The accurate and prompt diagnosis of SARS-CoV-2 infection is required for the control and treatment of the coronavirus infection disease 2019 (COVID-19). In this study, we aimed to investigate the time courses of the anti-severe acute corona respiratory syndrome coronavirus 2 (SARS-CoV-2) IgM and IgG titers and to evaluate the sensitivity and specificity of such tests according to the specific day after the onset of COVID-19 among a patient population in Japan. We measured the titers of SARS-CoV-2 IgM and IgG in sera from 105 subjects, including 26 symptomatic COVID-19 patients, using chemiluminescent immunoassay (CLIA) methods utilizing magnetic beads coated with SARS-CoV-2 nucleocapsid protein and spike protein. The results of a ROC analysis suggested the possibility that the cutoff values in Japan might be lower than the manufacturer's reported cutoff (10 AU/mL): 1 AU/mL for IgM and 5 AU/mL for IgG. The sensitivity of the test before Day 8 after symptom onset was less than 50%; at Days 9-10, however, we obtained a much higher sensitivity of 81.8% for both IgM and IgG. At 15 days or later after symptom onset, the SARS-CoV-2 IgG test had a sensitivity of 100%. These results suggest that if the number of days since disease onset is taken into consideration, these antibody tests could be very useful for the diagnosis of COVID-19 and similar diseases.
  • |*Antibody Specificity[MESH]
  • |COVID-19 Testing[MESH]
  • |COVID-19/*immunology/virology[MESH]
  • |Enzyme-Linked Immunosorbent Assay[MESH]
  • |Humans[MESH]
  • |Immunoglobulin G/*immunology[MESH]
  • |Immunoglobulin M/*immunology[MESH]
  • |Japan[MESH]


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