摘要
本研究根据伪狂犬病病毒（ＰｒＶ）共有ｇＢ和疫苗株缺失的ｇＥ基因序列分别设计并合成１对通用（ＰＢ１／ＰＢ２）和１对鉴别引物（ＰＥ１／ＰＥ２），以在我国广泛使用的疫苗株Ｂａｒｔｈａ－Ｋ６１及从国内外收集的野毒株Ｓ、ＳＵ、Ｆ、Ｌ、Ｙ、Ｍｉｎ－Ａ、Ｓｈｏｐｅ、Ｓ（川）、ＳＬ１、１０＃、ＥＡ（鄂Ａ）ＤＮＡ为模板在同一反应管中同时扩增ｇＢ和ｇＥ基因序列建立了复合多聚酶链反应（ＰＣＲ）方法。ＰＣＲ产物经２．０％琼脂糖凝胶电泳显示，从所有１１株野毒ＤＮＡ中都扩增出３７２ｂｐ和５２６ｂｐ两个片段，而Ｂａｒｔｈａ－ｋ６１只扩增出３７２ｐｂ一个片段。酶切分析证明ＰＣＲ产物是特异性的。ｇＢ基因是ＰｒＶ主要保护性抗原基因，是病毒复制必需的，强弱毒都有此基因；Ｂａｒｔｈａ－Ｋ６１株是ｇＥ基因缺失的弱毒。所以，本实验建立的方法通过１次ＰＣＲ即可有效鉴别疫苗毒与野毒。这一方法将在今后根除伪狂犬病计划中发挥重要作用。
In order to
differentiate genedeleted vaccine from wildtype viruses,two pairs of primers PB/PB2 and
PE1/PE2,were designed based on sequences of Pseudorabies virus (prV) gB and gE gene. A
combined PCR with four primers was established and two fragments were amplified with size of
372bp and 526bp from eleven wildtype isloates,S,SU,F,Y,L,MinA,Shope,S(),SL1,10# and EA,but
only one fragment with size of 372bp from vaccine strain BarthaK61.PrV gB is a major
protective antigen and is essential for virus replication,thus,both vaccine strain and wildtype
virus have the gene;gE only presents in wildtype virus and is absent in vaccine strain
BarthaK61.Therefore,thecombined PCR would be useful in differentiation of PrV infection from
vaccination in future eradication program.
出处
《中国兽医杂志》
CAS
北大核心
1999年第5期3-5,共3页
Chinese Journal of Veterinary Medicine
