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Lancet Infect Dis:新冠肺炎患者呼吸道病毒载量以及血清抗体反应研究

2020-03-24 MedSci原创 MedSci原创

口咽后唾液样本分析发现,COVID-19患者呼吸道病毒载量极高,这一发现强调了严格的感染控制和早期使用有效的抗病毒药物对高危人群的重要性。血清学检测可作为RT-qPCR诊断的补充

虽然,中国地区2019年冠状病毒病(COVID-19)疫情已得到了有效控制,但尚无严重急性呼吸综合征冠状病毒2(SARS-CoV-2)感染者的呼吸道病毒载量和血清抗体反应数据。近日研究人员对COVID-19患者口咽后(深喉部)唾液样本中的呼吸道病毒载量以及血清抗体反应进行了考察。
 
研究在香港开展,实验室确认的COVID-19患者参与。对其进行血液、尿液、口咽后唾液和直肠拭子样本采集。采用逆转录酶定量PCR(RT-qPC R)检测序列病毒载量,采用EIA法测定了SARS-CoV-2内核蛋白(NP)和表面棘突蛋白受体结合域(RBD)的抗体水平。
 
23名患者参与研究,平均年龄62岁。患者口咽后唾液或其他呼吸道标本中的病毒载量中位数为5.2 log10 拷贝/ mL。唾液病毒载量在症状出现后的第一周最高,然后随时间下降(斜率-0.15)。1名患者在症状出现后25天检测到病毒RNA。年龄越大,病毒载量越高。16例患者在症状出现后14天或更长时间内,血清抗NP-IgG阳性率为94%(n=15),抗NP-IgM阳性率为88%(n=14),抗RBD-IgG阳性率为100%(n=16),抗RBD-IgM阳性率为94%(n=15)。抗SARS-CoV-2-NP或抗SARS-CoV-2-RBD IgG水平与病毒中和滴度相关,序列样本中未检测到基因组突变。
 
口咽后唾液样本分析发现,COVID-19患者呼吸道病毒载量极高,这一发现强调了严格的感染控制和早期使用有效的抗病毒药物对高危人群的重要性。血清学检测可作为RT-qPCR诊断的补充。
 
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    2020-07-09 howi
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    2020-03-26 zhmscau
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    2020-03-24 公卫新人

    新冠肺炎,疫情何时才能消失

    0

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