African Horse Sickness
Early Warning System
2016/2017 outbreak.
Outbreak Alert:
Maltahoehe, NAM.
Outbreak Alert:
White river, MPU.
Outbreak Alert:
Kyalami, GAU.
Urgent! Press Release
AHS Trust Research Support and Programmes
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)

If AHS is spread by midges who are infected, how do the midges become infected in the first place? Is it not because of innoculating our horses that the midges biting them are spreading the horse sickness from the injected horses?

Asked: 3/1/2008, 14:32 by Debbie Geyer.
Answered: 5/1/2008, 16:08 by Douglas Welsh, James Urry.

The midges get infected with the AHS virus from taking a blood meal from a horse/donkey/zebra in the same way that Malaria is transmitted by certain female Anopheles mosquitoes. The inoculation form of the virus (which has been alteredso that it causes an immune reaction, but does not cause theAHS disease)cannot be transmitted via the midges and therefore inoculating does not risk the spread of AHS. The transmission of the disease during the warm summer monthswhen the midges are the most active and require blood meals to breed is our risk period. During the winter when the midges do not breed we know that the virus remains (or over-winters)inanimals suchas zebra's that can carry the virus, but are unaffected by it.


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