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Title
Host condition and individual risk of cowpox virus infection in natural animal populations: Cause or effect?
Author(s)
Beldomenico, P. M.;Telfer, S.;Lukomski, L.;Gebert, S.;Bennett, M.;Begon, M.
Published
2009
Publisher
Epidemiology and Infection
Abstract
Recent studies have provided evidence that endemic pathogens may affect dynamics in animals. However, such studies have not typically considered that infected individuals might have a preceding underlying poor condition. We examined whether individuals in poor condition are more likely to become infected by an endemic pathogen, using as a system the dynamics of cowpox virus in field voles. With data from monthly sampled vole populations, a nested case-control study evaluated whether susceptible individuals with poorer condition had higher probabilities of contracting cowpox. The influence of condition was found to be considerable, especially for males. At times when a susceptible male with good body condition had a relatively low probability of becoming infected, a susceptible male with poor body condition was twice as likely to contract cowpox; if this male was also anaemic, the chances were almost quadrupled. We discuss the care needed when interpreting the findings of wildlife disease studies. © 2009 Cambridge University Press.
Keywords
Cowpox;Disease ecology;Microtus;Population dynamics;Wildlife disease
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PUB13372