West Nile virus appearing in the Region; first human case for 2012 found in Oakville.

By Staff

BURLINGTON, ON  September 5, 2012  A female in her thirties is Oakville’s first human case of West Nile virus (WNV) illness in 2012. Human WNV infections in Halton now total eleven.

Full human and mosquito surveillance s shown below.

While the numbers aren’t huge, they do indicate that we are seeing increased instances of the West Nile virus.  Follow the advice the Regional Health department puts out and you should be fine.  If you feel any differences in your health – head for a Walk in Clinic.


Map indicates where Larvicide has been applied to standing water sites.  If there are places on your property where water is standing – clear it out – the mosquitoes love places where the water is still.

Mosquitoes can transmit WNV to humans after becoming infected by feeding on the blood of birds carrying the virus. About 80% of people who become infected with WNV do not experience any illness, while about 20% will develop West Nile fever.

Less than 1% will develop inflammation of the brain or its lining, or a type of paralysis. Older adults and people with underlying illnesses should be particularly cautious as they are more likely to develop the illness. The following are steps that residents can take to protect themselves and their families from mosquitoes:

Cover up. Wear light-coloured, long-sleeved shirts and pants with tightly-woven fabric.

Avoid being outdoors from early evening to morning when mosquitoes are most active, as well as at any time in shady, wooded areas.

Reduce mosquito breeding sites around your home by getting rid of all water-filled containers and objects. Change the water in bird baths at least once per week.

Use an approved insect repellent, such as one containing DEET.

Make sure your window and door screens are tight and in good repair.

This is a relatively easy virus to manage – but it does have to be managed.


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