Descriptive spatial analysis of the epidemic of bovine spongiform encephalopathy in Great Britain to June 1997

作     者：Stevenson, MA Wilesmith, JW Ryan, JBM Morris, RS Lawson, AB Pfeiffer, DU Lin, D 

作者机构：Massey Univ Inst Vet Anim & Biomed Sci Palmerston North New Zealand Vet Labs Agcy Dept Epidemiol Weybridge KT15 3NB Surrey England Univ Aberdeen Dept Math Sci Aberdeen AB24 3UE Scotland 

出 版 物：《VETERINARY RECORD》 (兽医记录)

年 卷 期：2000年第147卷第14期

页      面：379-384页

核心收录：

学科分类：0906[农学-兽医学] 09[农学] 

主　　题：脑病 牛海绵状/流行病学 流行病学方法 患病率 动物 牛 

摘      要：This was a spatial analysis of the epidemic of bovine spongiform encephalopathy (BSE) in Great Britain, based on agricultural census data collected between 1986 and 1996 and BSE case data collected up to lune 1997. Kernel smoothing techniques were used to plot the distribution of BSE-positive cattle holdings per inn holdings per square kilometre and the distribution of confirmed BSE cases per inn head of cattle per square kilometre. In the early stages of the epidemic reported BSE cases were scattered widely throughout Great Britain, with no clearly identifiable Focus. By June 1997, a statistically significant cluster of BSE-positive holdings was identifiable in the eastern part of the South west region of England. During the epidemic the highest densities of confirmed BSE cases per ton cattle per square kilometre occurred in the greater part of the South west region of England and within Dyfed in the south west of Wales. In Wales, a small number of holdings experienced large numbers of confirmed BSE cases. In the South west region of England a large number of holdings experienced small numbers of confirmed cases. By lune 1997. the distribution of BSE-positive holdings across Great Britain was largely determined by factors that influenced the amount of recycled infectious material they were exposed to.