目的:了解青海省流行风疹病毒(Rubella virus，RV)基因型及基因特征。方法:2010年和2019年分别采集2个市州疑似风疹病例的咽拭子标本，经核酸检测和病毒分离后，扩增并测定阳性病毒分离株基因分型靶基因序列，即E1基因的739个核苷酸片段，然后与世界卫生组织(World Health Organization, WHO)推荐的13个基因型的32株参考株序列进行比对以确定基因型别，同时与我国其他省份流行RV株序列进行基因亲缘性关系分析。结果:本研究分离获得4株RV病毒株，经基因亲缘性关系分析显示，这些病毒株分属于1E-Cluster A基因亚型和2B-Cluster C基因亚型，与我国同期其他省份RV流行趋势基本一致。青海省4株病毒株在氨基酸水平高度保守，但也存在地区特异性的突变位点。结论:本研究为青海省风疹防控策略的制定提供了一定的实验室数据。“,”Objective:To understand the genotype and genetic characteristics of rubella virus (RV) circulated in Qinghai province.Methods:The throat swabs were collected from suspected rubella cases in two cities of Qinghai province in 2010 and 2019, respectively. After nucleic acid detection and virus isolation, the target genotyping sequences (739 nucleotide fragments of E1 gene) of positive virus isolates were amplified and determined. The sequences of the viruses were compared with 32 reference strains of 13 genotypes recommended by World Health Organization(WHO) to determine the genotype, and the genetic relationship between Qinghai isolates and RV strains from other provinces of China was also analyzed.Results:In this study, four RV virus strains were isolated, and the genetic relationship analysis showed that these virus strains were classified into 1E-Cluster A sub-genotype and 2B-Cluster C sub-genotype, which was basically consistent with the epidemic trend of RV in other provinces of China. The four virus strains in Qinghai province were highly conserved at the amino acid level, but region-specific mutation sites were also found.Conclusions:This study provides some laboratory data for the formulation of rubella prevention and control strategy in Qinghai province..