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10.1021/acs.analchem.0c03484

http://scihub22266oqcxt.onion/10.1021/acs.analchem.0c03484
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33207872!ä!33207872

suck abstract from ncbi


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pmid33207872      Anal+Chem 2020 ; 92 (23): 15542-15549
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  • Sensitive and Simultaneous Detection of SARS-CoV-2-Specific IgM/IgG Using Lateral Flow Immunoassay Based on Dual-Mode Quantum Dot Nanobeads #MMPMID33207872
  • Wang C; Yang X; Gu B; Liu H; Zhou Z; Shi L; Cheng X; Wang S
  • Anal Chem 2020[Dec]; 92 (23): 15542-15549 PMID33207872show ga
  • A rapid and accurate method for detection of virus (SARS-CoV-2)-specific antibodies is important to contain the 2019 coronavirus disease (COVID-19) outbreak, which is still urgently needed. Here, we develop a colorimetric-fluorescent dual-mode lateral flow immunoassay (LFIA) biosensor for rapid, sensitive, and simultaneous detection of SARS-CoV-2-specific IgM and IgG in human serum using spike (S) protein-conjugated SiO(2)@Au@QD nanobeads (NBs) as labels. The assay only needs 1 muL of the serum sample, can be completed within 15 min, and is 100 times more sensitive than the colloidal gold-based LFIA. Two detection modes of our biosensor are available: the colorimetric mode for rapid screening of the patients with suspected SARS-CoV-2 infection without any special instrument and the fluorescent mode for sensitive and quantitative analyses to determine the concentrations of specific IgM/IgG in human serum and detect the infection early and precisely. We validated the proposed method using 16 positive serum samples from patients with COVID-19 and 41 negative samples from patients with other viral respiratory infections. The results demonstrated that combined detection of virus-specific IgM and IgG via SiO(2)@Au@QD LFIA can identify 100% of patients with SARS-CoV-2 infection with 100% specificity.
  • |Antibodies, Viral/*blood[MESH]
  • |COVID-19/*diagnosis/virology[MESH]
  • |Gold/chemistry[MESH]
  • |Humans[MESH]
  • |Immunoassay/*methods[MESH]
  • |Immunoglobulin G/*blood[MESH]
  • |Immunoglobulin M/*blood[MESH]
  • |Particle Size[MESH]
  • |Quantum Dots/*chemistry[MESH]
  • |SARS-CoV-2/*immunology/isolation & purification/metabolism[MESH]
  • |Sensitivity and Specificity[MESH]
  • |Silicon Dioxide/chemistry[MESH]


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