Changing incidence of bovine babesiosis in Ireland

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Title: Changing incidence of bovine babesiosis in Ireland
Authors: Zintl, Annetta
McGrath, Guy
O'Grady, Luke
Gray, J. (Jeremy S.)
et al.
Permanent link: http://hdl.handle.net/10197/7736
Date: 5-Sep-2014
Abstract: Background: In Ireland bovine babesiosis is caused by the tick-borne blood parasite, Babesia divergens. A survey of veterinary practitioners and farmers in the 1980’s revealed an annual incidence of 1.7% associated with considerable economic losses. However, two subsequent surveys in the 1990’s indicated a decline in clinical babesiosis. Recent evidence from continental Europe suggests that, probably due to climate change, the distribution of the tick vector of B. divergens, Ixodes ricinus is extending to more northerly regions and higher altitudes. In addition, milder winters are thought to widen the window of tick activity. In order to determine whether any such changes have affected the incidence of bovine babesiosis in Ireland, a questionnaire survey of farmers and veterinarians was carried out and compared with data from previous surveys. Results: Our survey indicates that while the incidence of clinical disease has continued to decline, cases can occur at any time of year. In contrast to previous surveys, affected farms were the same size as unaffected ones. There was no correlation between disease risk and the presence of deer on the land. Disease severity and mortality rates were increased because many infections were advanced by the time they were detected and treated. Conclusion: While the precise reasons for the decline in the incidence of redwater are unknown, changes in agricultural practice are likely to be of importance. A reversal of the trend could be devastating, as vigilance among farmers and veterinarians is flagging and the national herd is losing its protective immunity to disease.
Funding Details: European Commission Horizon 2020
Type of material: Journal Article
Publisher: BioMed Central
Copyright (published version): 2014 the Authors
Keywords: Tick-borne parasite;Redwater fever;Farm survey;Babesia divergens
DOI: 10.1186/2046-0481-67-19
Language: en
Status of Item: Peer reviewed
Appears in Collections:Biology & Environmental Science Research Collection
Veterinary Medicine Research Collection
CVERA Research Collection

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