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Control of vectors by using insecticides or protection from vectors by moving animals into barns during the evening hours lowers the number of Culicoides bites and subsequently the risk of exposure to bluetongue virus infection.
Control of vectors by using insecticides or protection from vectors by moving animals into barns during the evening hours lowers the number of Culicoides bites and subsequently the risk of exposure to bluetongue virus infection.
===UK Outbreaks===
===Control in the UK===
In the UK, Bluetongue is a notifiable disease and so cases must be reported to the local AHO. There are also further obligations for notification: within 24 hours of confirmation of bluetongue in the UK, the Chief Veterinary Officer must inform the European Commission and the OIE Central Bureau. There are several broad principles of disease control when bluetongue appears in the UK<sup>15</sup>. Firstly, premises suspected of having the disease are inspected by a veterinary surgeon, and a ban is placed on moving animals on and off the site. Once it has been confirmed that bluetongue is circulating (i.e. there is not a single, isolated case of disease, for example due to importation), a restricted zone is imposed around the infected premises. A restricted zone is the overall area where restrictions apply and is composed of a Protection Zone (100km radius) surrounded by a surveillance zone (50km radius). The sizes of these zones are dictated by EU legislation for bluetongue control. The restricted zone may also contain control zones of tighter restrictions in the immediate vicinity (20km) of infected premises. Movements are permitted within protection and suveillance zones, and from the surveillance zone to the protection zone. Animals from neighbouring BTV-free areas may move into either the surveillance or protected zones. However, the converse of any of these movements is not permitted unless animals are travelling to slaughter. No movements are permitted within, to, or from the control zone.
In 2007, BTV-8 was confirmed in the UK and control measures implemented. However, the last BTV-8 infected premise was confirmed in the UK in November 2008, and since this date the situation has remained unchanged. No imported ruminants have tested positive for BTV-8 and there is no evidence that the disease has been circulating since this point. On 12th June 2010 the UK's status was changed from a protection zone for BTV-8 to a lower risk zone (LRZ). This status allows continues to allow vaccination against BTV, and imposes stricter restrictions on importing animals from zones with the same BTV serotype. The aim of this is to help prevent bluetongue re-entering the country. Up-to-date information on the current UK bluetongue situation can be found on the [http://www.defra.gov.uk/foodfarm/farmanimal/diseases/atoz/bluetongue/latest/index.htm DEFRA Bluetongue: Latest situation] webpage.
In the UK, Bluetongue is a notifiable disease and so cases must be reported to the local AHO. There are also further obligations for notification: within 24 hours of confirmation of bluetongue in the UK, the Chief Veterinary Officer must inform the European Commission and the OIE Central Bureau. There are several broad principles of disease control when a bluetongue outbreak occurs in the UK<sup>15</sup>. Firstly, premises suspected of having the disease are inspected by a veterinary surgeon, and a ban is placed on moving animals on and off the site. Once it has been confirmed that bluetongue is circulating (i.e. there is not a single, isolated case of disease, for example due to importation), a restricted zone is imposed around the infected premises. A restricted zone is the overall area where restrictions apply and is composed of a protection zone (100km radius) surrounded by a surveillance zone (50km radius). The sizes of these zones are dictated by EU legislation for bluetongue control. The restricted zone may also contain control zones of tighter restrictions in the immediate vicinity (20km) of infected premises. Movements are permitted within protection and suveillance zones, and from the surveillance zone to the protection zone. Animals from neighbouring BTV-free areas may move into either the surveillance or protected zones. However, the converse of any of these movements is not permitted unless animals are travelling to slaughter. No movements are permitted within, to, or from the control zone.
In addition to movement resrtictions, surveillance for disease and vectors are implemented as necessary in an outbreak, and relevant communications are made to owners and veterinary surgeons to advise of the measures in place. The aim at all times is to tightly control disease, with an aim to eradication, and vaccination will normally play a large part in this according to plans laid out by DEFRA. A test and slaugher policy is not used, because BTV is not transmitted directly between susceptible animals.
In addition to movement resrtictions, surveillance for disease and vectors are implemented as necessary in an outbreak, and relevant communications are made to owners and veterinary surgeons to advise of the measures in place. The aim at all times is to tightly control disease, with an aim to eradication, and vaccination will normally play a large part in this according to plans laid out by DEFRA. A test and slaugher policy is not used, because BTV is not transmitted directly between susceptible animals.