medRxiv: 检测新冠病毒核酸,痰液样本比咽拭子更准确?

2020-02-27 于晓程 生物探索 生物探索 微信号 biod

2月23日,武汉大学中南医院与武汉市金银潭医院在 medRxiv 预印本平台上发表的文章指出,与咽拭子样本相比,通过痰液样本进行2019-nCoV检测更准确、便捷。

2月23日,武汉大学中南医院与武汉市金银潭医院在 medRxiv 预印本平台上发表的文章指出,与咽拭子样本相比,通过痰液样本进行2019-nCoV检测更准确、便捷。  
 
基于实时逆转录聚合酶链式反应分析(qRT-PCR)检测病毒核酸序列是确诊新冠肺炎的主要手段,检验样本主要是咽拭子,若收集不规范就容易导致漏诊,而且对于医务人员而言,收集过程极具风险。适当地选择样本对于呼吸道病毒感染诊断很重要,因此有必要寻找具有更高检测效率和精度的样本类型。
 
这项研究从54例病例中获得咽拭子和痰液的配对样本,提取RNA并通过qRT-PCR法检测2019-nCoV,以比较咽拭子和痰标本之间的阳性率。结果发现,痰标本和咽拭子中2019-nCoV的阳性率分别为76.9%和44.2%,大部分患者(51.9%)咽拭子和痰标本检测结果相同,然而相当多的患者(40.4%)痰标本阳性、咽拭子阴性,只有极少数患者(7.7%)痰标本阴性、咽拭子阳性,痰液样本显示出明显高于咽拭子样本的阳性率(P=0.001)。


疑似COVID-19患者咽拭子和痰液样本的qRT-PCR结果分布

痰标本中2019-nCoV的检出率高于咽拭子检出率,这可能与新型冠状病毒主要侵袭和感染下呼吸道细胞导致咳嗽、肺炎等临床表现有关。虽然病例数较少且在将来还需增加对支气管肺泡灌洗液和血液标本的讨论,但该研究提示了痰液对新冠状病毒的检测的价值,可方便标本的选择,提高COVID-19诊断的准确性。

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    2021-01-20 sodoo
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    2020-03-21 zhzhxiang
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    2020-02-27 公卫新人

    新冠肺炎,疫情何时才能消失

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