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Prevalence and risk factors associated with bovine viral diarrhea virus infection in dairy herds in Jordan

机译：约旦奶牛群中牛病毒性腹泻病毒感染的患病率和危险因素

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摘要

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.
机译：在2007年1月至6月间，对约旦的62个未接种疫苗的奶牛群（671头母牛）进行了一项横断面研究，以确定其血清阳性率，并确定与牛病毒性腹泻病毒（BVDV）感染相关的危险因素。通过与农民的个人访谈记录下来。使用间接ELISA试验检测抗BVDV的抗体。卡方分析和多变量logistic回归模型用于确定BVDV血清阳性的危险因素。在个体牛和牛群中，针对BVDV的抗体的真实患病率分别为31.6％和80.7％。大中型牛群的BVDV血清阳性率显着高于小牛群。不同年龄组之间的BVD血清阳性率无显着差异。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，并且在添加畜群之前不隔离新购买的动物。位于约旦北部各省的奶牛中，BVDV的血清阳性率显着高于其他研究的省。这项研究的结果表明，BVDV在约旦非常流行，BVDV感染可以通过畜牧业贸易控制来控制，并在奶牛场采用严格的生物安全措施。

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