of the virus within their own bodies before innoculation. after an animal becomes infected by a virus-vector midge, a viraemia (virus circulation in blood) develops which lasts 2-5 days. after an incubation period (time from initial infection to development of clinical signs) of 1 to 6 days, the animals...
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and dealing with sick and fallen or culled birds and animals. one of the biggest influences on animal welfare in pro- duction systems is the interaction between animal and humans. many production systems rely on regu- lar, close contact between humans and animals, which can have either a negative or...
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often recover in a period of weeks though carrier sheep may harbour infection and act as a source for other animals for long periods. the clinical consequences of infection are determined by the strain of virus, the immune resistance of the animal infected and other factors. various strains have varying...