A bite from an infected mosquito can cause West Nile virus (WNV) and be spread amongst humans and other animals.
WNV first appeared in North America in 1999.
With equine cases of WNV detected in Ontario (3), Alberta (1), Saskatchewan (10) and Manitoba (6), WNV remains a threat to owners.
Signs of West Nile Virus
WNV in horses affects the central nervous system. Symptoms vary from trembling, depression, loss of appetite, stumbling and in-coordination, weakness, head tilting and partial paralysis, to convulsions and even death. Fever occurs in 25% of cases.
These symptoms are similar to other nervous system diseases such as rabies and equine encephalitis.
If you observe any symptoms of WNV or other nervous system disease in your horse, consult your veterinarian immediately.
Protect yourself and your horse
1. Talk to your veterinarian about a complete vaccination program to protect your horse from WNV and other diseases. There are two WNV vaccines approved for use in horses that have been widely tested and are safe to use.
2. Eliminate potential mosquito breeding areas on your property.
- Clean up and empty containers of standing water such as barrels or old tires.
- Change water in troughs and birdbaths frequently
- Clear leaves, twigs and other debris from rain gutters and drainage ditches
3. Add extra protection to avoid mosquito bites such as using fly spray or a flysheet/fly mask on your horse
4. Avoid outdoor activities during peak mosquito times at dawn and dusk
5. Utilize repellent containing DEET but be careful to read and follow all label directions for use
There has been a recent case of WNV In southern Ontario. Learn more here.