Eastern Equine Encephalitis (EEE): In 2011 there were a large
number of cases of EEE seen in non-vaccinated horses in Northern
Wisconsin. This disease is usually fatal in horses- with a 90%
mortality rate! EEE is caused by a virus that infects the brain
resulting in encephalitis (inflammation of the brain) and
neurologic symptoms. This virus is transmitted via a mosquito
bite. Birds, horses and also people can become infected.
Migrating birds can readily spread the virus to new areas.
Fortunately, there is a vaccine available for horses. It is
usually given in a combination vaccine that includes WEE
(Western Equine Encephalitis), tetanus and West Nile Virus. WEE
& West NileVirus are also spread by mosquitoes. In Wisconsin, we
recommend annual vaccination in the spring- before the start of
"mosquito season". If a horse hasn't been vaccinated previously,
a series of two vaccines are recommended, given 3-4 weeks apart.
Call us at Fredonia Veterinary Clinic if you have questions on
vaccination recommendations for