中文摘要：

为研究新疆地区羊口疮（0rf）病毒（ORFV）的生物学特性及流行特征，本研究采集新疆地区疑似Off的羔羊结痂病料，用MDBK传代细胞进行病毒分离培养及电镜观察，进行动物回归实验；对ORFVB2L基因进行PCR扩增，并构建B2L基因原核表达重组质粒pET-32a-B2L，转化至大肠杆菌BL21。将表达产物进行SDS-PAGE及westernblot检测，结果证明所获得的分离株ORFV-shz为ORFV，与India67／04分离株的亲缘关系最近，其重组B2L蛋白大小为60ku，并具有良好反应原性。

英文摘要：

To investigate the biological and epidemiological characters of Orf virus （ORFV）, the dry scab samples were collected from Lamb in Xinjiang area. A virus was isolated in MDBK cell line and primarily identified as the ORFV by electron microscope examination. Then the virus was inoculated to the sheep via skin scarification and the animal developed the typical signs of ORFV infection. Moreover, the B2L gene was amplified according to the ORFV sequence and clone into pET32a for expression in E.coli. SDS-PAGE analysis showed the recombinant B2L was about 60 ku and reacted positively with the ORFV positive serum identified by western blot. Furthermore, the phylogenetic analysis based on B2L gene indicated that the isolate was a high homology with the India 67/04 strain.