Clinica Chimica Acta:血清SARS-CoV-2检测诊断性能和阈值

2020-07-19 MedSci原创 MedSci原创

评估SARS-CoV-2冠状病毒特异性抗体(Ab)检测结果对建立和监测病毒在社区的传播至关重要。

评估SARS-CoV-2冠状病毒特异性抗体(Ab)检测结果对建立和监测病毒在社区的传播至关重要。在这项以IgG抗体为重点的研究中,比较了三种化学发光(CLIA)和两种酶联免疫吸附(ELISA)检测的可靠性。

研究人员使用Maglumi (Snibe)、Liaison、iFlash (Yhlo)、Euroimmun (Medizinische Labordiagnostika AG)和Wantai (Wantai Biological Pharmacy)检测共271例受试者的血清,包括64例经逆转录-聚合酶链反应(RT-PCR)证实的SARS-CoV-2患者的特异性抗体。使用制造商和优化的阈值评估诊断敏感性和特异性、阳性和阴性似然比。

优化的阈值(Maglumi 2 kAU/L、Liaison 6.2 kAU/L和iFlash 15.0 kAU/L)获得负似然比和准确性分别为Maglumi:0.06和93.5%; Liaison :0.03和93.1%以及iFlash为0.03和91%。所有CLIA测定法的诊断敏感性和特异性分别高于93.8%和85.9%。CLIA的总体一致性为90.3% (Cohen’s kappa = 0.805, SE = 0.041), ELISA的总体一致性为98.4% (Cohen’s kappa = 0.962, SE = 0.126)。

所获得的结果表明, CLIA有可能定义提高负似然比的阈值。因此,如果检测结果为阴性,就可以确定有感染风险的受试者,随后应对他们进行长期密切监测,以防止病毒进一步传播。此外,重新定义的阈值改善了化验间的整体协议,为更好地统一血清学试验奠定了基础。

原始出处:

MarioPlebaniAndreaPadoanDiagnostic performances and thresholds: The key to harmonization in serological SARS-CoV-2 assays?

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    2020-11-28 hukaixun
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    2020-12-25 windight
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    2020-12-18 swallow
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    2020-07-21 小刀医生
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    2020-07-21 qjddjq