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相关概念视频

Enzyme-Linked Immunosorbent Assay01:33

Enzyme-Linked Immunosorbent Assay

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In 1971, Peter Perlman and Eva Engvall developed an Enzyme-linked immunosorbent assay (ELISA or EIA). ELISA differs from western blot in that the assays are conducted in microtiter plates or in vivo rather than on an absorbent membrane.
There are many different types of ELISAs, but they all involve an antibody molecule whose constant region binds an enzyme, leaving the variable region free to bind its specific antigen.  Enzyme-substrate reaction allows the antigen to be visualized or...
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Rapid, Safe, and Simple Manual Bedside Nucleic Acid Extraction for the Detection of Virus in Whole Blood Samples
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序列优化诊断试验用于埃博拉病毒检测.

Jeffrey W Koehler1, Christopher P Stefan1, Adrienne T Hall1

  • 1Diagnostic Systems Division, United States Army Medical Research Institute of Infectious Diseases (USAMRIID), 1425 Porter Street, Fort Detrick, MD, 20102, USA.

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此摘要是机器生成的。

埃博拉病毒 (EBOV) 实时PCR测定中的序列不匹配显著降低了灵敏度. 重新设计测试以适应EBOV遗传多样性可以改善变种的检测,并提高诊断准确度.

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科学领域:

  • 分子生物学分子生物学
  • 病毒学 病毒学
  • 传染病诊断 传染病诊断 传染病诊断

背景情况:

  • 快速发现病原体对于疫情控制和患者管理至关重要.
  • 实时PCR为传染病诊断提供了高灵敏度和特异性.
  • 调试剂/探针序列不匹配可能会损害测试性能,导致错误阴性.

研究的目的:

  • 评估序列不匹配对埃博拉病毒 (EBOV) 实时PCR测定性能的影响.
  • 评估重新设计的EBOV试验在检测多种病毒变异中的有效性.

主要方法:

  • 从2013-2016年爆发的EBOV Makona中测序变异的分析.
  • 在形评估的初始化/探针不匹配对测试灵敏度的影响.
  • 重新设计和验证EBOV实时PCR分析.
  • 在人类EBOV样本上对原始和重新设计的试验进行比较性能的测试.

主要成果:

  • 一个或两个原料/探头不匹配导致灵敏度从最小降低到近两个日志.
  • 重新设计的EBOV试验表明,在测试的变种中检测能力有所提高.
  • 新的测定显示了增加的灵敏度,由较低的Cq值和检测之前错过的阳性样本所证明.

结论:

  • EBOV的遗传多样性可以显著损害实时PCR诊断试验的敏感性.
  • 测试重新设计以考虑序列变异对于准确的EBOV检测至关重要.
  • 改进的EBOV测定提高了疫情应对和患者护理的诊断能力.