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Management interventions in dairy herds: exploring within herd uncertainty using an integrated Bayesian model

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Green, M. J., Medley, Graham, Bradley, Andrew J. and Browne, W. J. (2010) Management interventions in dairy herds: exploring within herd uncertainty using an integrated Bayesian model. Veterinary Research, Vol.41 (No.2). 10 pages. doi:10.1051/vetres/2009070 ISSN 0928-4249.

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Official URL: http://dx.doi.org/10.1051/vetres/2009070

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Abstract

Knowledge of the efficacy of an intervention for disease control on an individual farm is essential to make good decisions on preventive healthcare, but the uncertainty in outcome associated with undertaking a specific control strategy has rarely been considered in veterinary medicine. The purpose of this research was to explore the uncertainty in change in disease incidence and financial benefit that could occur on different farms, when two effective farm management interventions are undertaken. Bovine mastitis was used as an example disease and the research was conducted using data from an intervention study as prior information within an integrated Bayesian simulation model. Predictions were made of the reduction in clinical mastitis within 30 days of calving on 52 farms, attributable to the application of two herd interventions previously reported as effective; rotation of dry cow pasture and differential dry cow therapy. Results indicated that there were important degrees of uncertainty in the predicted reduction in clinical mastitis for individual farms when either intervention was undertaken; the magnitude of the 95% credible intervals for reduced clinical mastitis incidence were substantial and of clinical relevance. The large uncertainty associated with the predicted reduction in clinical mastitis attributable to the interventions resulted in important variability in possible financial outcomes for each farm. The uncertainty in outcome associated with farm control measures illustrates the difficulty facing a veterinary clinician when making an on-farm decision and highlights the importance of iterative herd health procedures (continual evaluation, reassessment and adjusted interventions) to optimise health in an individual herd.

Item Type: Journal Article
Subjects: S Agriculture > SF Animal culture
Divisions: Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) > Biological Sciences ( -2010)
Library of Congress Subject Headings (LCSH): Dairy cattle -- Diseases, Communicable diseases in animals -- Mathematical models, Uncertainty (Information theory), Bayesian statistical decision theory
Journal or Publication Title: Veterinary Research
Publisher: EDP Sciences
ISSN: 0928-4249
Official Date: March 2010
Dates:
DateEvent
March 2010Published
Volume: Vol.41
Number: No.2
Page Range: 10 pages
DOI: 10.1051/vetres/2009070
Status: Peer Reviewed
Access rights to Published version: Open Access (Creative Commons)
Funder: Wellcome Trust (London, England), Milk Development Council (Great Britain) (MDC)

Data sourced from Thomson Reuters' Web of Knowledge

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