本研究旨在建立一种灵敏、快速检测猪δ冠状病毒(porcine deltacoronavirus,PDCoV)的TaqMan荧光定量RT-PCR方法。参照GenBank中PDCoV有关基因序列,设计一对特异性引物用于扩增PDCoV M 基因。将测序正确的基因片段克隆入pMD18-T载体,构...本研究旨在建立一种灵敏、快速检测猪δ冠状病毒(porcine deltacoronavirus,PDCoV)的TaqMan荧光定量RT-PCR方法。参照GenBank中PDCoV有关基因序列,设计一对特异性引物用于扩增PDCoV M 基因。将测序正确的基因片段克隆入pMD18-T载体,构建重组质粒作为建立标准曲线的病毒模板。设计合成一对特异性引物与TaqMan探针,进行反应条件和反应体系的优化,建立快速检测PDCoV的TaqMan实时荧光定量RT-PCR方法,并进行该方法的灵敏性、特异性与重复性验证。结果表明,该方法能有效扩增1.0×10^1 ~1.0×10^9 拷贝·μL^-1 的PDCoV标准质粒,建立的标准曲线呈现良好的线性关系。该方法的检测灵敏度为1.0×10^1 拷贝·μL^-1;对猪流行性腹泻病毒、猪传染性胃肠炎病毒、猪伪狂犬病病毒等病原不发生交叉反应,具有很好的特异性;重复性试验结果显示变异系数(CV)小于1%,重复性良好。对2017—2018年期间收集的河南省不同猪场的100份腹泻病料进行检测,PDCoV的阳性检出率为23%(23/100),与PDCoV SYBR Green Ⅰ荧光定量RT-PCR检测方法的符合率为100%。人工感染PDCoV的仔猪,取攻毒后不同时间的粪便样品,应用本研究建立方法与常规RT-PCR方法对样品进行检测,TaqMan荧光定量RT-PCR检测方法的灵敏度远远优于常规RT-PCR。上述结果表明,本研究所建立的TaqMan荧光定量RT-PCR检测方法能够灵敏、特异地检测PDCoV,可用于临床PDCoV的检测。展开更多
To establish a TaqMan-based real-time RT-PCR method for detection of canine distemper virus,the pair of primers and the TaqMan-based probe were designed according to the M protein genes of canine distemper virus strai...To establish a TaqMan-based real-time RT-PCR method for detection of canine distemper virus,the pair of primers and the TaqMan-based probe were designed according to the M protein genes of canine distemper virus strains.The reactive conditions were optimized to improve the sensitivity and specificity of the method.The specificity and sensitivity of the method were high.Canine distemper virus in the thirty-eight samples had been tested by the TaqMan-based real-time RT-PCR,the common RT-PCR and electron microscopy.The sensitivity of the TaqMan-based real-time RT-PCR was higher than the common RT-PCR and electron microscopy.This suggests that the method may be used in clinical diagnosis,epizootic study and laboratory research.展开更多
研究旨在建立一种适用于鸭坦布苏病毒检测的荧光定量Taq Man RT-PCR技术。以JXSP株RNA为模板,建立检测鸭坦布苏病毒的实时荧光定量RT-PCR方法。制备含有上述目的片段的RNA作为标准品,10倍比稀释后建立标准曲线,测定敏感性。同时采用标...研究旨在建立一种适用于鸭坦布苏病毒检测的荧光定量Taq Man RT-PCR技术。以JXSP株RNA为模板,建立检测鸭坦布苏病毒的实时荧光定量RT-PCR方法。制备含有上述目的片段的RNA作为标准品,10倍比稀释后建立标准曲线,测定敏感性。同时采用标准品对该方法的批内和批间重复性进行检测,并与本实验室所保存的多种病毒进行特异性检测。结果:建立的荧光定量Taq Man RT-PCR方法能在鸭坦布苏病毒JXSP株RNA样本中检出荧光信号。最低检出量为2.06×10~1拷贝/反应;线性范围达9个数量级。该方法重复性良好,批内变异系数不足0.4%;批间变异系数不足2.2%。该方法具有良好的特异性、敏感性和重复性,经体外感染细胞培养物及临床样品检测证实,该方法可实时反映病毒液中的病毒含量,可在获得样品后3 h以内得到检测结果,可用于临床样品中鸭坦布苏病毒的快速检测。展开更多
文摘To establish a TaqMan-based real-time RT-PCR method for detection of canine distemper virus,the pair of primers and the TaqMan-based probe were designed according to the M protein genes of canine distemper virus strains.The reactive conditions were optimized to improve the sensitivity and specificity of the method.The specificity and sensitivity of the method were high.Canine distemper virus in the thirty-eight samples had been tested by the TaqMan-based real-time RT-PCR,the common RT-PCR and electron microscopy.The sensitivity of the TaqMan-based real-time RT-PCR was higher than the common RT-PCR and electron microscopy.This suggests that the method may be used in clinical diagnosis,epizootic study and laboratory research.
文摘研究旨在建立一种适用于鸭坦布苏病毒检测的荧光定量Taq Man RT-PCR技术。以JXSP株RNA为模板,建立检测鸭坦布苏病毒的实时荧光定量RT-PCR方法。制备含有上述目的片段的RNA作为标准品,10倍比稀释后建立标准曲线,测定敏感性。同时采用标准品对该方法的批内和批间重复性进行检测,并与本实验室所保存的多种病毒进行特异性检测。结果:建立的荧光定量Taq Man RT-PCR方法能在鸭坦布苏病毒JXSP株RNA样本中检出荧光信号。最低检出量为2.06×10~1拷贝/反应;线性范围达9个数量级。该方法重复性良好,批内变异系数不足0.4%;批间变异系数不足2.2%。该方法具有良好的特异性、敏感性和重复性,经体外感染细胞培养物及临床样品检测证实,该方法可实时反映病毒液中的病毒含量,可在获得样品后3 h以内得到检测结果,可用于临床样品中鸭坦布苏病毒的快速检测。
