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Control of bovine leukosis virus in a dairy herd by a change in dehorning
R F DiGiacomo1, S G Hopkins, R L Darlington
1Department of Epidemiology, School of Public Health and Community Medicine, University of Washington, Seattle 98195.
Abstract:
Following the demonstration that bovine leukosis virus was transmitted in calves by gouge dehorning, electrical dehorning at a younger age was implemented in a commercial Holstein herd. Subsequently, annual testing of the herd revealed a decline in the prevalence of bovine leukosis virus antibodies as older cattle dehorned by the former method were replaced by younger cattle dehorned by the latter method.