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10.1038/s41467-021-22072-9

http://scihub22266oqcxt.onion/10.1038/s41467-021-22072-9
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33771993!7997897!33771993
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suck abstract from ncbi


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pmid33771993      Nat+Commun 2021 ; 12 (1): 1931
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  • N-protein presents early in blood, dried blood and saliva during asymptomatic and symptomatic SARS-CoV-2 infection #MMPMID33771993
  • Shan D; Johnson JM; Fernandes SC; Suib H; Hwang S; Wuelfing D; Mendes M; Holdridge M; Burke EM; Beauregard K; Zhang Y; Cleary M; Xu S; Yao X; Patel PP; Plavina T; Wilson DH; Chang L; Kaiser KM; Nattermann J; Schmidt SV; Latz E; Hrusovsky K; Mattoon D; Ball AJ
  • Nat Commun 2021[Mar]; 12 (1): 1931 PMID33771993show ga
  • The COVID-19 pandemic continues to have an unprecedented impact on societies and economies worldwide. There remains an ongoing need for high-performance SARS-CoV-2 tests which may be broadly deployed for infection monitoring. Here we report a highly sensitive single molecule array (Simoa) immunoassay in development for detection of SARS-CoV-2 nucleocapsid protein (N-protein) in venous and capillary blood and saliva. In all matrices in the studies conducted to date we observe >98% negative percent agreement and >90% positive percent agreement with molecular testing for days 1-7 in symptomatic, asymptomatic, and pre-symptomatic PCR+ individuals. N-protein load decreases as anti-SARS-CoV-2 spike-IgG increases, and N-protein levels correlate with RT-PCR Ct-values in saliva, and between matched saliva and capillary blood samples. This Simoa SARS-CoV-2 N-protein assay effectively detects SARS-CoV-2 infection via measurement of antigen levels in blood or saliva, using non-invasive, swab-independent collection methods, offering potential for at home and point of care sample collection.
  • |COVID-19 Testing/*methods[MESH]
  • |COVID-19/*diagnosis/epidemiology/virology[MESH]
  • |Coronavirus Nucleocapsid Proteins/*blood/genetics[MESH]
  • |Epidemics[MESH]
  • |Home Care Services[MESH]
  • |Humans[MESH]
  • |Point-of-Care Systems[MESH]
  • |ROC Curve[MESH]
  • |SARS-CoV-2/genetics/*metabolism/physiology[MESH]
  • |Saliva/*virology[MESH]


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