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Introduction
1.1 History
Two authors first described BVD in 1946. Affected cattle displayed watery bloody diarrhoea, mucous membrane erosions, fever...
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1.2 Economic loss
Economic losses through BVD are high. They depend on a variety of different factors, such as herd structure , the percentage of susceptible (seronegative) animals in the various age groups, the risk of exposure, the magnitude of loss caused by the infection of a susceptible animal...
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