刚察地区牛传染性鼻气管炎的血清学调查

牛传染性鼻气管炎是由病毒引起的一种急性呼吸道传染病 ,其特征为生殖道感染、结膜炎、脑膜炎和流产等多种病状 ,仅感染牛。为了了解牛传染性鼻气管炎在刚察县的流行情况 ,1998年我们在进行牛羊布氏杆菌病血检的同时 ,应用间接血凝试验 ,对刚察地区的牛进行了血清学调查。1　材料和方法1 1　材料 :抗原、阳性血清均系中国农业科学院兰州兽医研究所提供 ,被检血清采自全县 5乡 1场以及青海省三角城种羊场、青海湖农场的牦牛、黄牛和犏牛。1 2　方法 :间接血凝试验 ,按中国农业科学院兰州兽医研究所制定的方法进行操作与判定。2　检验结果共检…     

青海省牛传染性鼻气管炎及病毒性腹泻黏膜病血清学调查

从青海省互助、玛多、海晏、玉树、贵德、德令哈、共和等14个地区采集牛血清样品420份,应用酶联免疫吸附试验（ELISA）调查了青海省牛传染性鼻气管炎和病毒性腹泻黏膜病的感染情况。结果在被检牛血清420份样品中,共检出阳性血清样品228份,平均阳性率为50.67%（228/420）;在被检牦牛血清180份样品中,共检出阳性血清样品1份,平均阳性率0.56%（1/180）。     

内蒙古地区部分奶牛场牛传染性鼻气管炎的血清学调查

为了解内蒙古地区牛传染性鼻气管炎在奶牛场的流行情况,对内蒙古地区的16个大、中、小型奶牛养殖场的2 321头奶牛,应用ELISA方法进行牛传染性鼻气管炎的血清流行病学调查。结果显示,5个大型奶牛场牛传染性鼻气管炎的阳性率在68.5%~100%之间,5个中型奶牛场的阳性率在34.0%~84.2%之间,6个小型奶牛场的阳性率在32.6%~89.3%之间,平均阳性率为75.7%。     

河南省奶牛传染性鼻气管炎血清学调查

为了解河南省奶牛传染性鼻气管炎感染的流行情况,对河南省豫东、豫西、豫南、豫北和郑州市5个地区24个奶牛小区的538头奶牛随机采血,进行酶联免疫吸附试验,检测奶牛传染性鼻气管炎病毒血清抗体,结果显示24个奶牛小区均有抗体阳性牛,场阳性率为100%,其中传染性鼻气管炎病毒(IBRV)抗体阳性率最高的牛场阳性率为84%,阳性率最低的牛场阳性率为26.67%。538头奶牛有319头为IBRV抗体阳性,阳性率为59.29%,表明该病在河南普遍存在。     

内蒙古地区牛传染性鼻气管炎血清学调查

牛传染性鼻气管炎(Infectious Bovine Rhinotracheitis,IBR)是由牛疱疹病毒Ⅰ型(Bovine Herpesvirus-1,BHV-Ⅰ)引起的家养和野生牛的一种急性、热性、接触性传染病。临床表现形式多样,但以呼吸道症状为主,伴有结膜炎、流产、乳腺炎,有时诱发小牛脑炎等。急性IBRV呼吸道感染还可继发细菌性肺炎。此     

贵州省奶牛传染性鼻气管炎的血清学调查

奶牛传染性鼻气管炎(IBR)是一种由病毒引起的一种急性、热性、接触性传染病，以高热、呼吸困难、鼻炎、鼻窦炎和上呼吸道炎症为主要特征。目前在世界范围内流行，对奶牛的产奶量、奶牛群继发性流产、公牛的繁殖力及使役力均有较大影响，而且急性的IBR呼吸道感染可继发牛致命性的细菌性肺炎，是造成养牛业经济损失的主要原因之一。此病     

牦牛病毒性腹泻/黏膜病和传染性鼻气管炎血清学调查

为掌握青海省大通种牛场和海晏县牦牛病毒性腹泻/黏膜病、传染性鼻气管炎的感染和流行情况,2010年3月至5月在大通种牛场和海晏地区采集252份牦牛血清样品,应用定量酶联免疫吸附试验（ELISA）对牦牛病毒性腹泻/黏膜病和传染性鼻气管炎的进行了血清抗体检测。结果显示,大通种牛场牦牛群中牛病毒性腹泻/黏膜病阳性率为23.42%,传染性鼻气管炎阳性率为65.45%;海晏县牦牛群中牛病毒性腹泻/黏膜病阳性率为19.86%,传染性鼻气管炎阳性率为4.96%。     

Comparison of the immunizing effectiveness of subunit vaccine and inactivated viral oil vaccine against infectious rhinotracheitis of cattle

Trials were conducted on rabbits and cattle to compare the immunizing effectiveness of the subunit vaccine against infectious bovine rhinotracheitis (IBR), representing antigens separated by the solubilization of the IBR virus-infected cells by means of Triton X-100 with oil adjuvant, with the inactivated oil IBR vaccine. The rabbits inoculated and re-vaccinated with both vaccines in an interval of three weeks produced neutralizing antibodies in medium titres, the values of these antibodies were balanced in both groups. Cattle immunized with the subunit vaccine reacted to the inoculation and re-vaccination by producing serum antibodies of higher titres, as compared with the cattle inoculated with the virus vaccine; secretory antibodies were detected only after re-vaccination and had balanced values in both test groups. After intranasal infection with the virulent virus performed after 14 days from re-vaccination, the calves inoculated with the subunit and virus vaccines were protected against clinical disease whereas the non-inoculated control calves fell ill with symptoms characteristic of IBR. The immunized animals of both experimental groups had a smaller amount of virus p.i. in nasal secretions and for a shorter time than the control non-inoculated calves. The intensity of multiplication and persistence of infectious virus excretion were the same in both experimental groups.