摘要
本研究建立了一种快速的鸡传染性支气管炎病毒(IBV)H52株定量检测方法,为进一步研究疫苗的效价检测和质量监控新方法奠定基础。针对IBV核蛋白(N)基因,设计特异的H52株荧光定量PCR检测引物和TaqMan-MGB探针,优化反应体系和条件后进行特异性、敏感性、重复性试验,探讨荧光定量RT-PCR与EID50方法测定病毒含量的相关性,并通过体外转录技术对病毒基因拷贝数进行定量分析。该方法特异性强,与其他禽源病毒均无交叉反应;该方法可检测到5.60×101拷贝/μL的病毒核酸,与常规PCR相比,敏感性高10倍;重复性试验的变异系数为0.9%～3.2%;与EID50检测结果的相关系数r=0.934,两种方法在检测H52株病毒效价上具有很好的相关性。本研究建立的TaqMan-MGB荧光定量RT-PCR方法,适合于对鸡传染性支气管炎病毒H52株病毒含量的快速定量检测。
A rapid assay for detecting avian infectious bronchitis virus was established and laid the foundation for further study on new methods of vaccine potency testing and quality control.Primers and probe of fluorescence quantitative PCR were designed for H52 strain,according to the N gene of IBV.Then the method was optimized.Specificity,sensitivity,and repeatability were tested and the correlation was explored between the quantitative RT-PCR method and EID50 on the determination of virus quntity.In addition,in vitro transcription technology was used to develop a quantitative PCR format with virus copies amount.It was highly specific and no cross-reactions were found with other avian pathogens.The assay had a detection limit of 5.60×101 copies/μL viral RNA,which was 10 times more sensitive than the conventional PCR.Coefficient of variation value ranged from 0.9% to 3.2% in repeatability test.Compared with EID50 test results,the correlation coefficient r was 0.934,which showed that two methods in detecting the virus titer on the H52 strain had a good correlation.This assay of TaqMan-MGB fluorescence quantitative RT-PCR is suitable for rapid and quantitative detection of IBV H52 strain.
出处
《中国畜牧兽医》
CAS
北大核心
2012年第4期169-173,共5页
China Animal Husbandry & Veterinary Medicine
基金
"十一五"国家支撑计划子课题(2006BAK02A03-1)
