Equine viral arteritis (EVA) has been confirmed in a stallion in Staffordshire. An investigation is underway to establish the likely origin of the infection, as well as any mares that may have been affected.

Equine viral arteritis (EVA) has been confirmed in a stallion in Staffordshire. An investigation is underway to establish the likely origin of the infection, as well as any mares that may have been affected.

Clinical signs of equine viral arteritis include depression

The variety and severity of clinical signs of EVA vary widely. Infection may be obvious or there may be no signs at all.

EVA can cause abortions. Other signs include fever, depression, lethargy, stiff movement, runny nose, conjunctivitis (pink eye), swelling of the lower parts of the legs, around the eye and of the reproductive organs.

 
Breeding restrictions have been put in place on the infected stallion and the disease is being controlled in line with the industry agreed Horse Betting Levy Board codes of practice, according to DEFRA.
 
EVA is a notifiable disease under the Equine Viral Arteritis Order 1995, although there are no human health implications associated with the disease. It is a viral infection of horses that occurs worldwide including in mainland Europe. It is transmitted by:

  • Mating,
  • Artificial insemination,
  • Contact with infected foetuses; and
  • Via droplets from the respiratory tract.

There is no available treatment for the disease, although certain treatments may help to alleviate some of the symptoms – but these should be determined by the attending veterinary surgeon.
 
A preventative vaccine for EVA is available and veterinary advice should be sought about how and when this should be administered.
 
Further information on the disease, including information on diagnosis and vaccination, is available from the DEFRA website.

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