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THE impact of Schmallenberg virus (SBV) in the 2012/13 calving and lambing season should be low in regions affected this year, according to the latest scientific report on the virus from the European Food Safety Authority (EFSA). However, the authority warns that, assuming SBV survived the winter of 2011, the virus is likely to spread in unaffected regions that have suitable temperatures for transmission by vectors within herds and a high density of susceptible species.
The EFSA's report, which is available at www.efsa.europa.eu/en/efsajournal/pub/2768.htm, provides an overall assessment of the impact of SBV on animal health, production and welfare in Europe. It notes that the prediction of a low impact in previously affected regions assumes that there was a high prevalence of infection and that animals develop postinfection immunity. It also points out that, while there is currently a lack of data available to …
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