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 your horses or would like to schedule an appointment/farm call.

For more information on EEE and the cases in Northern Wisconsin, click on EEE in Wisconsin.