Infectious bovine rhinotracheitis outbreaks in dairy cows

Outbreaks of infectious bovine rhinotracheitis in dairy cattle. Louping ill in cattle and sheep. Vitamin A, D and E deficiency in fattening cattle. Dosing gun injuries in sheep. Large outbreak of lameness in sheep caused by a strawberry footrot-like condition. These are among matters discussed in the Veterinary Laboratories Agency's (VLA's) disease surveillance report for November 2010.     

牛传染性鼻气管炎病毒gB蛋白研究进展

牛传染性鼻气管炎病毒能引起牛多系统感染,是导致养牛业重大经济损失的一种重要病原。该病毒是有囊膜的双股DNA病毒,病毒囊膜蛋白在病毒致病中发挥了重要作用,其中gB蛋白对病毒的吸附、侵入、复制和细胞间扩散是必需的,可刺激机体产生大量的中和抗体。对gB蛋白的研究不仅是理解病毒分子生物学功能特征的需要,而且在临床诊断和疾病预防中也具有重要意义。文章就gB蛋白的结构特征、生物学功能以及在免疫学和诊断方面的研究做了综述,并对上述方面进行了展望。     

Infectious bovine rhinotracheitis: a review and update.

Infectious bovine rhinotracheitis (IBR), a herpesvirus infection of cattle, has diverse clinical manifestations. Known mainly as a respiratory tract disease characterized by tracheitis, rhinitis, and fever, IBR plays a prominent role among causes of undifferentiated bovine respiratory disease and abortion. It also causes conjunctivitis, infectious pustular vulvovaginitis, balanoposthitis, and rarely, encephalitis. The virus is readily transmitted and has worldwide distribution. Some cattle develop a latent infection, which can be reactivated. The disease can be diagnosed by clinical signs and lesions and by a variety of virologic and immunologic techniques. Control of IBR is based largely on vaccination. A review is timely because efficient utilization of the wide assortment of available vaccines requires knowledge of recent developments in the diagnosis, immunology, and epidemiology of the disease.     

1株牛传染性鼻气管炎病毒的分离鉴定

在对进口种用奶牛隔离检疫期间,从1头IBRV中和抗体阳性奶牛中分离出1株病毒。该分离株表现类似于IBRV特征的细胞病变,细胞圆缩,聚集成葡萄串样群落,在单层细胞上形成空洞。用特异性抗IBRV阳性血清与其进行中和试验,发现IBRV标准阳性血清对分离株的中和抗体滴度为27,与IBRV标准株的中和抗体滴度相差不到1个滴度。用OIEV推荐的IBR特异性引物对分离病毒进行PCR扩增,获得与设计基因片段大小一致的特异性条带,表明分离到的病毒为IBRV。