贵阳地区犬细小病毒VP2基因的克隆及遗传进化分析

摘要

This study was aimed to investigate popular genotype and phylogenesis of VP2 gene of canine parvovirus (CPV) in Guiyang area.Ten strains of viruses were isolated from Guiyang and the VP2 gene was amplified by PCR, cloned and sequenced.Results showed that the isolate virus grew could produce typical CPE in F81 cells, seven strains of CPV were CPV type 2a and others were CPV type 2c, named as GY-1 to GY-10.The nucleotide homologies of the isolated strains compared with 3 vaccine strains were 98.4% to 99.4%, with others reference strains nucleotide homologies within 97.7% to 99.9%.This research firstly reported the prevalence of CPV genotype was CPV type 2a in Guiyang area with such CPV type 2c, this was very important for monitoring the trend of CPV genetic variation and the development of vaccine.%为研究贵阳地区犬细小病毒(canine parvovirus,CPV)的流行基因型及其遗传进化情况,本试验对从贵阳市分离的10株CPV的VP2基因进行PCR扩增和克隆并进行序列分析.结果显示,分离的病毒能使F81猫肾细胞产生明显的细胞病变(CPE),分离的10株病毒中,7株为CPV-2a亚型,3株为CPV-2c亚型,命名为GY-1~GY-10.10株CPV分离株与疫苗株VP2基因的同源性98.4%~99.4%,与其他国内外参考株的同源性为97.7%~99.9%.本试验首次报道贵阳市CPV的流行基因型为CPV-2a亚型并伴随CPV-2c亚型存在,对监测CPV遗传变异趋势及疫苗的研制具有重要意义.