Herd size and bovine tuberculosis persistence in cattle farms in Great Britain
Herd size and bovine tuberculosis persistence in cattle farms in Great Britain
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DOI：
10.1016/j.prevetmed.2009.08.022
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发表时间：
2009-12-01
影响因子：
2.6
通讯作者：
Keeling, Matt
中科院分区：
文献类型：
--
作者：
Brooks-Pollock, Ellen;Keeling, Matt
牛结核病（bTB）感染是当今英国养牛业面临的最复杂和最持久的问题之一。虽然已经确定了一些增加感染风险的因素，但很少分析农场内持续感染的原因。在这篇文章中，我们使用牛跟踪系统来检查牛群规模的变化，并使用VetNet数据来将牛群规模与bTB的清除率相关联。我们发现，2002年至2007年，活跃农场的数量下降了16.3%。2002年至2005年，平均农场规模增加了17.9%。使用类似于临界社区规模的衡量标准，VetNet数据显示，畜群规模与疾病持续性呈正相关。由于经济政策和补贴已被证明会影响农场规模，我们使用了一个简单的财务模型，理想的农场规模，其中包括疾病负担的结论是，增加畜群规模的效率收益可能有助于增加疾病的发病率。(C)2009爱思唯尔有限公司版权所有。
Bovine tuberculosis (bTB) infection in cattle is one of the most complex and persistent problems faced by the cattle industry in Great Britain today. While a number of factors have been identified as increasing the risk of infection, there has been little analysis on the causes of persistent infection within farms. In this article, we use the Cattle Tracing System to examine changes in herd size and VetNet data to correlate herd size with clearance of bTB. We find that the number of active farms fell by 16.3% between 2002 and 2007. The average farm size increased by 17.9% between 2002 and 2005. Using a measure similar to the Critical Community Size, the VetNet data reveal that herd size is positively correlated with disease persistence. Since economic policy and subsidies have been shown to influence farm size, we used a simple financial model for ideal farm size which includes disease burden to conclude that increasing herd size for efficiency gains may contribute to increased disease incidence. (C) 2009 Elsevier B.V. All rights reserved.