首页> 外文期刊>Diagnostic microbiology and infectious disease >Reverse-transcription polymerase chain reaction/pyrosequencing to characterize neuraminidase H275 residue of influenza A 2009 H1N1 virus for rapid and specific detection of the viral oseltamivir resistance marker in a clinical laboratory
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Reverse-transcription polymerase chain reaction/pyrosequencing to characterize neuraminidase H275 residue of influenza A 2009 H1N1 virus for rapid and specific detection of the viral oseltamivir resistance marker in a clinical laboratory

机译:逆转录聚合酶链反应/焦磷酸测序可表征A流感2009 H1N1病毒的神经氨酸酶H275残留,以便在临床实验室中快速,特异性地检测病毒奥司他韦耐药标记

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摘要

Pandemic 2009 H1N1 is normally susceptible to oseltamivir, but variants harboring the H275Y (CAC → TAC) mutation exhibit resistance. We describe the use of a combined reverse-transcription polymerase chain reaction (RT-PCR)/pyrosequencing approach to identify the H275 residue. A total of 223 specimens were tested with this method: 216 randomly selected clinical specimens positive for 2009 H1N1 and 7 cell-culture supernatants from the Centers for Disease Control and Prevention (CDC; 4 resistant, 3 susceptible 2009 H1N1 strains). The assay detected H275Y in 1 clinical respiratory sample (0.5%) and all 4 oseltamivir-resistant strains from the CDC; the remaining 215 clinical and 3 susceptible CDC specimens were wild-type. Sanger sequencing confirmed the results for 50 of 50 selected isolates. The RT-PCR/pyrosequencing method was highly specific, producing no amplicons or valid sequences from samples containing non-H1N1 viruses or bacteria. Our findings suggest that this method provides a rapid tool for H275Y detection, with high sensitivity and potential benefit for patient care.
机译:大流行2009 H1N1病毒通常对奥司他韦敏感,但带有H275Y(CAC→TAC)突变的变体表现出抗药性。我们描述了结合使用逆转录聚合酶链反应(RT-PCR)/焦磷酸测序方法来鉴定H275残基。用此方法测试了总共223个标本:随机选择了对2009 H1N1呈阳性的临床标本和来自疾病控制与预防中心的7种细胞培养上清液(CDC; 4种抗药性,3种易感的2009 H1N1菌株)。该检测在CDC的1例临床呼吸道样本(0.5%)和所有4株耐奥司他韦的菌株中检测到H275Y。其余215个临床CDC标本和3个敏感CDC标本为野生型。 Sanger测序证实了50个分离株中有50个的结果。 RT-PCR /焦磷酸测序方法具有很高的特异性,不会从含有非H1N1病毒或细菌的样品中产生扩增子或有效序列。我们的发现表明,该方法为H275Y检测提供了一种快速工具,具有高灵敏度和对患者护理的潜在益处。

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