There is no specific treatment for West Nile encephalitis in horses. Supportive veterinary care is recommended.
Can a horse recover from West Nile virus?
Many horses will improve within 5 to 7 days of displaying clinical signs, however about 20-30% can exhibit severe neurological deficits for several weeks. In cases of WNV, 33% will die, 50% will fully recover and 17% will have relapse or incomplete recovery. Treatment includes treating a fever if present.
How long does West Nile vaccine last in horses?
The West Nile-INNOVATORTM vaccine requires two injections, spaced three to six weeks apart. This part is critical in order for the vaccine to take its full effect. Immunity may not develop for four to six weeks after the second injection. A booster is recommended every six months to continue protection.
When should horses be vaccinated for West Nile?
Because of the high mortality associated with West Nile virus, it is recommended that foals born in areas where there is a high risk of exposure to West Nile virus should receive an initial series of three (3) doses of vaccine against West Nile beginning at 3 months of age and at 4- to 6- week intervals.
How do horses get West Nile virus?
In the equine population, the virus is transmitted when a mosquito takes a blood meal from a bird infected with WNV, then feeds on a horse. While many horses exposed to WNV experience no signs of illness, the virus can cause inflammation of the brain and spinal cord.
How long does West Nile virus last?
Living with West Nile Virus
Most people recover in a few days. Some symptoms may last a few weeks, such as weakness or fatigue. But they will go away on their own. Most people who develop severe illness from West Nile virus recover.
Do horses need to be vaccinated every year?
Core Vaccines. DO have your horse vaccinated with all core vaccines, which are those the American Veterinary Medical Association and AAEP recommend for all horses, every year, regardless of location, gender, or age.
How common is West Nile in horses?
West Nile Virus (WNV) is a mosquito-borne virus that affects humans and other animals, of which horses represent 96.9% of reported non-human cases.
How often should you vaccinate your horse?
Pleasure and performance horses should be vaccinated every 3–6 mo, depending on the risk of exposure. Broodmares should have an EHV-4 vaccination 2–4 wk before foaling to ensure the availability of colostral immunity.