宁夏吴忠地区规模化奶牛场流产牛病原血清学调查

为了调查宁夏吴忠地区奶牛场因传染性因素造成流产的基本情况,应用酶联免疫吸附试验(ELISA)对可能造成感染流产的牛传染性鼻气管炎病毒、新孢子虫、牛病毒性腹泻病毒的抗体及布鲁菌的抗原进行了血清学检测。结果显示,牛传染性鼻气管炎病毒抗体阳性率为48.84%,新孢子虫抗体阳性率为30.23%,牛病毒性腹泻病毒抗体阳性率为19.77%,布鲁菌抗原阳性率为24.42%。牛场阳性率高达100%。根据统计显示,不同妊娠胎次的奶牛流产率差异显著(P0.05),其中第1胎流产率与其他胎次间差异极显著(P0.01)。不同妊娠时间的奶牛流产率差异不显著(P0.05)。调查表明,宁夏部分奶牛场存在不同程度的牛传染性鼻气管炎病毒、新孢子虫、牛病毒性腹泻病毒和布鲁菌感染。

Serological Investigation on Infectious Pathogens in Abortion Cows of Large-scale Dairy Farms in Wuzhong of Ningxia

An epidemiological survey on infectious factors causing abortion in dariy cows was carried out in the Wuzhong of Ningxia.All sera were tested for seroprevalences of infectious bovine rhinotracheitis(IBR),neosporia-sis,bovine viral diarrhea(BVD)and brucellosis that may cause abortion by the ELISA.The overall seroprevalence of IBR was 48.84%,the overall seroprevalence of neosporiasis was 30.23%,the overall seroprevalence of BVD was 19.77%,the overall seroprevalence of brucellosis was 24.42%.The seroprevalence rate of dairy cow farms was 100%.The statistic analysis showed that there was a significant difference (P<0.05)in abortion rates of different parities among that there was a extremly significant difference(P<0.01)in first parity compared with other pari-ties,but the abortion rates had no significant difference (P >0.05)between different pregnancy time.The results showed that different degrees of infections of IBRV,Neospora caninum,BVDV and Brucella exist in part of the dairy cow farms in Ningxia.