African Horse Sickness
Early Warning System
2016/2017 outbreak.
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Posted: 3/2/2017, 19:58.
Notice of restricted African Horse Sickness Vaccination Period
Notice of restricted African Horse Sickness Vaccination Period
Posted: 14/4/2015, 21:33.
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Frequently Asked Questions (FAQs)

Several horses died in the Western Cape last year, but my understanding is that they all had encephalosis, and not AHS. Is this correct? Is there anything one can do to protect the horses against encephalosis, apart from trying to stop the midges biting them?

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.


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