用智能手机也可以检测新冠病毒了 手机有新冠病毒吗( 六 )


基于 LAMP 的诊断的临床应用受到假阳性(引物二聚体扩增)的限制 。14 - 16通过开发 LAMP 协议克服了这一技术挑战,该协议优化了病毒 RNA 稳定性和 cDNA 合成的实验条件,既提高了灵敏度,又有效消除了由于引物二聚体扩增引起的假阳性(eMethods、eTable 1、eFigure 1,以及补充材料中的 eFigure 2) 。我们发现,除了反应混合物组成外,反应混合物组分的组装顺序对于提高 LAMP 性能和减少引物二聚体形成至关重要 。此外,智能手机应用程序提供了 25 分钟的反应时间截止时间,以区分样本样本扩增(早期)和引物二聚体扩增(晚期) 。
false positives 假阳性 ; false positive的复数
positives 优势 ; 优点 ; 正片 ; 阳性结果 ; positive的复数
due to 由于 ; 应付
in addition to 另外,加之,除…之外
imparts 通知 ; 透露 ; 传授 ; 把赋予 ; 将…给予 ; impart的第三人称单数
Study Design
学习规划
A head-to-head comparison of smaRT-LAMP, hereafter referred to as smartphone-based LAMP assay, and criterion-standard RT-qPCR methodologies was performed using human saliva samples spiked with either SARS-CoV-2 or influenza viruses. These analyses were then used as the basis for development of a smartphone-based LAMP detection platform for SARS-CoV-2 from self-collected clinical saliva samples obtained from hospitalized patients with COVID-19. Sensitivity and specificity tests using spiked saliva specimens were performed as per the Food and Drug Administration’s Emergency Use Authorization guidelines41 (eMethods in the Supplement).
使用掺有 SARS-CoV-2 或流感病毒的人类唾液样本对 smaRT-LAMP(以下称为基于智能手机的 LAMP 测定)和标准标准 RT-qPCR 方法进行了头对头比较 。然后,这些分析被用作开发基于智能手机的 LAMP 检测平台的基础,该平台从 COVID-19 住院患者的自我收集临床唾液样本中检测到 SARS-CoV-2 。根据食品和药物管理局的紧急使用授权指南41(附录中的电子方法),使用加标的唾液样本进行敏感性和特异性测试 。
head-to-head 正面交锋的 ; 面对面的 ; 肉搏战 ; 白刃战
hereafter 以后 ; 以下 ; 此后 ; 今后 ; 将来 ; 在本文件其余部分 ; 死后 ; 死后的生命 ; 阴世
referred to as 被称为 ; 简称 ; 称作
methodologies 方法,原则 ; methodology的复数
saliva 唾液
spiked 有尖刺的 ; 带钉的 ; 用尖物刺入 ; 在…中偷偷掺入 ; 拒绝发表 ; 阻止…传播 ; 阻挠 ; spike的过去分词和过去式
hospitalized 送入院治疗 ; hospitalize的过去分词和过去式
as per 根据 ; 按照
Participants were deemed eligible based on the STARD reporting guideline for diagnostic tests.42 Eligible participants had no prior known SARS-CoV-2 infection, and presented with a new positive or negative SARS-CoV-2 PCR test, obtained within 12 hours of specimen collection. Potential participants were identified by the presence of new flu-like symptoms or dyspnea in the hospital emergency department or an inpatient ward. Recruitment took place between January 12, 2021, and May 11, 2021, and were enrolled forming a convenience series.
根据诊断测试的 STARD 报告指南,参与者被认为符合条件 。42名符合条件的参与者之前没有已知的 SARS-CoV-2 感染,并在样本采集后 12 小时内获得了新的阳性或阴性 SARS-CoV-2 PCR 测试 。通过医院急诊科或住院病房出现新的流感样症状或呼吸困难来确定潜在参与者 。招募于 2021 年 1 月 12 日至 2021 年 5 月 11 日之间进行,并被招募形成一个便利系列 。
based on 以……为基础;在……基础上,以……为依据
guideline 指南 ; 准则 ; 指导方针 ; 指导原则 ; 行动纲领 ; 参考
PCR 聚合酶链反应(Polymerase Chain Reaction) ; Photo-conductive Relay 光电导继电器
dyspnea 呼吸困难
in the hospital 在医院
emergency department 急诊科
inpatient 住院病人
Clinical saliva samples were evaluated for SARS-CoV-2, influenza A and B sensitivity, and quantitative detection of viral load. Fifty patient saliva specimens were split into equal volumes and a head-to-head comparison of the smartphone-based LAMP assay with the CDC RT-qPCR assay was performed. Sensitivity was determined by the presence or absence of sample signal (binary plus or minus call). Viral loads were determined by comparison of sample signal with that of standard curves established by serial dilution of spiked saliva samples (SARS-CoV-2) or by relative TCID50 quantitation (50% tissue culture infective dose assay) of spiked saliva samples (influenza A and B) (eMethods in the Supplement).
评估了临床唾液样本对 SARS-CoV-2、甲型和乙型流感的敏感性以及病毒载量的定量检测 。将 50 份患者唾液样本分成等体积,并对基于智能手机的 LAMP 检测与 CDC RT-qPCR 检测进行头对头比较 。灵敏度由样品信号的存在与否(二进制加号或减号)确定 。通过将样品信号与通过连续稀释加标唾液样品 (SARS-CoV-2) 或通过加标唾液样品 (流感A 和 B)(补充材料中的 eMethods ) 。