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Prevalence Estimation and Geographic Distribution of Scrapie in the Canadian Sheep Population via Abattoir Surveillance

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Title: Prevalence Estimation and Geographic Distribution of Scrapie in the Canadian Sheep Population via Abattoir Surveillance
Author: Tang, Jue
Department: Department of Population Medicine
Program: Population Medicine
Advisor: Berke, Olaf
Abstract: Classical scrapie, a federally reportable disease in Canada, is a fatal neurodegenerative disease of sheep and goats. In order to inform future scrapie eradication programs for Canada, a study estimating the national prevalence of scrapie was conducted from Nov 2010 to Dec 2012; seven cases were detected among 11,702 sheep. The prevalence at the individual level is estimated to be 0.06% (CI from 0.03% to 0.12%); at the farm-level it is estimated to be 0.22% (CI from 0.11% to 0.45%). A sampling information index was developed which measures the available sampling information at the Census Division (CD) level. A choropleth map is used to show the spatial distribution of this index. CDs with a low information index value cluster in the West Coast, the southern border between British Columbia and Alberta, southern Manitoba, northern Ontario and the Atlantic Provinces. These areas should be targeted in future surveillance activities.
URI: http://hdl.handle.net/10214/8285
Date: 2014-06
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