机构地区: 华南农业大学动物医学系
出 处: 《中国预防兽医学报》 2001年第4期295-299,共5页
摘 要: 选择NDV融合蛋白保守的编码区域 ,设计并合成了一对外引物和一对内引物 ,建立并优化了检测新城疫病毒核酸的逆转录套式PCR法 ,通过检测NDV感染的实验室病料和临床病料。结果表明 ,逆转录套式PCR法最低能鉴别出约 0 .3pg的NDVRNA ,攻毒后第 8天还能从非免疫鸡和SPF鸡泄殖腔拭子中检出NDV ,第 8天非免疫鸡泄殖腔拭子中NDV的最大检出率为 5 / 10 ,第 8天SPF鸡泄殖腔拭子中NDV的最大检出率为 6/ 10。对非免疫鸡和SPF鸡的泄殖腔中NDV最佳检出时间均在攻毒后第 5天。逆转录套式PCR方法对临床样品中NDV的最大检出率为 6/ 7。经核酸杂交验证 ,该法具有很高的特异性和敏感性 ,也比较简便快速 ,为从分子水平探讨NDV的发病机理、临床早期快速诊断提供了新的研究手段。 Two pairs of oligonucleotides flanking fusion(F) protein gene segments were chosen as primers for reverse transcription polymerase chain reaction(RT_nested PCR).The method of RT_nested PCR was used for detection of virus RNA(about 0.3pg)of NDV.The highest detection rate of NDV from cloacal swab of non_immunized chicken was 5/10 at the eighth day p.i,the highest detection rate of NDV from cloacal swabs of SPF chickens was 6/10.It suggested that RT_nested PCR was sensitive,spectific,rapid and simple,and can be applied in studing the pathogenesis at molecular level and early clinical diagnosis.