Frequently Asked Questions (FAQs)
Asked: 10/2/2008, 20:34 by Heila McKinley.
Answered: 11/2/2008, 20:05 by Douglas Welsh, James Urry.
That is correct. Based on clinical symptoms, AHS was initially thought to
have been the cause of the deaths of the horses. However, subsequent lab tests only isolated equine encephalosis virus (EEV). It is also important to note that EEV was not the cause of the deaths of the horses, but another common factor that remains under investigation did.
As EEV seldom leads to death, there has never been a need to develop a
vaccine and therefore you are correct in trying to prevent the midge (which can carry AHS) from biting the horse.