Talafha A Q, Hirche S M, Ababneh M M, Al-Majali A M, Ababneh M M
Department of Veterinary Clinical Sciences, Faculty of Veterinary Medicine, Jordan University of Science and Technology, P.O. Box 3030, Irbid 22110, Jordan.
Trop Anim Health Prod. 2009 Apr;41(4):499-506. doi: 10.1007/s11250-008-9214-6. Epub 2008 Jul 25.
A cross-sectional study was carried out to determine the seroprevalence and to identify risk factors associated with bovine viral diarrhea virus (BVDV) infection in 62 non-vaccinated dairy herds (671 cows) in Jordan between January and June 2007. Information regarding herd management was recorded through a personal interview with farmers. Antibodies against BVDV were detected using an indirect ELISA test. Chi-square analysis and multivariable logistic regression model were used to identify risk factors for BVDV seropositivity. The true prevalence of antibodies against BVDV in individual cows and cattle herds was 31.6% and 80.7%, respectively. The seroprevalence of BVDV in medium and large size herds was significantly higher than that in smaller herds. There was no significant difference in BVD seroprevalence between different age groups. Random-effects logistic regression model revealed two major factors associated with seropositivity to BVDV; exchange of visits between adjacent farm workers and not isolating newly purchased animals before addition to the herd. The seroprevalence of BVDV in cows located in the northern Jordanian governorates was significantly higher than that in other studied governorates. Results of this study indicated that BVDV is highly prevalent in Jordan and BVDV infection could be controlled by livestock-trade control, and applying strict biosecurity measures in the dairy farms.
2007年1月至6月，在约旦对62个未接种疫苗的奶牛场（671头奶牛）开展了一项横断面研究，以确定牛病毒性腹泻病毒（BVDV）感染的血清阳性率并识别相关风险因素。通过与养殖户进行个人访谈记录了有关牛群管理的信息。使用间接ELISA试验检测抗BVDV抗体。采用卡方分析和多变量逻辑回归模型识别BVDV血清阳性的风险因素。个体奶牛和牛群中抗BVDV抗体的实际阳性率分别为31.6%和80.7%。中型和大型牛群中BVDV的血清阳性率显著高于小型牛群。不同年龄组之间的BVD血清阳性率没有显著差异。随机效应逻辑回归模型揭示了与BVDV血清阳性相关的两个主要因素；相邻农场工人之间的互访以及新购入动物在并入牛群之前未进行隔离。位于约旦北部省份的奶牛中BVDV的血清阳性率显著高于其他研究省份。本研究结果表明，BVDV在约旦高度流行，可通过控制牲畜贸易以及在奶牛场实施严格的生物安全措施来控制BVDV感染。
