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Scientists create early-warning system to defend rare Jersey cows from continental disease
Date:1/5/2010

Scientists from the Institute for Animal Health, Pirbright, UK Met Office and the Jersey State Veterinary Service and Jersey Meteorological Department, are working together on an early-warning system to help defend cattle against the spread of 'bluetongue' disease, reveals a study published today in Weather. The team are fusing meteorological data with ecological information to anticipate when disease carrying midges are likely to be carried on the wind from the continent to the UK and Channel Islands.

"The bluetongue virus, BTV, represents a major and unprecedented epidemic which has spread across Western Europe since 2006," said lead author Dr Christopher J. Sanders from the Institute for Animal Health. "While accurate estimates of costs incurred are not yet available, it is estimated that these could be in the order of many tens of millions of pounds."

BTV is carried by small biting midges, Culicoides, one of the smallest species of biting flies found on livestock. One bite from a midge fully infected with BTV can be enough to lead to infection in cattle and sheep, which can be fatal.

Since 1998 the range of the African species of biting midge has expanded from the Mediterranean basin resulting in an overlap with the range of European species. This enabled European species of midge to pick up virus from infected animals for the first time and go on to transmit it in Southern Europe. However, the arrival of BTV in northern Europe in 2006 was independent of this northwards movement of BTV, jumping north rather than from a gradual spread, and was reliant on transmission only by European midges common and widespread in the area.

In 2006 the disease was found in Belgium, France, the Netherlands, Luxembourg and Germany; 700 km north of previous European outbreaks. In June 2007 the disease was once again reported in Germany and by October 2008 24,000 cases were reported in France alone. In September 2007, the first
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Contact: Ben Norman
Benorman@wiley.com
44-124-377-0375
Wiley-Blackwell
Source:Eurekalert

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