West Nile Virus Update

Residents and Visitors Encouraged to take precautions against mosquito bites

A locally acquired case of West Nile Virus (WNV) identified in a horse in Bruce County reinforces the message that residents and visitors need to take precautions against mosquito bites. As well, surveillance traps located in Owen Sound, Hanover and the Town of the Blue Mountains have detected mosquito species that can be carriers of the virus; none of the mosquitoes trapped to date were found to be carriers. However, positive mosquitoes have been found this year in neighbouring health unit areas.

WNV is transmitted through the bite of an infected mosquito. Symptoms usually develop 2 to 14 days after receiving a bite from an infected mosquito. Approximately 80% of those infected with WNV do not show any symptoms. Of the 20% that do show symptoms, most experience mild illness with symptoms such as fever, headache, body aches, fatigue, skin rash and occasionally, vomiting and nausea. Less than 1% of those infected with WNV experience severe illness involving the central nervous system.

The risk of exposure to WNV around the home can be reduced by eliminating mosquito breeding sites, including standing water in places such as bird baths, eavestroughs, flower pots and discarded tires; by wearing protective clothing; always using mosquito repellent when outdoors at dawn and dusk; and by preventing mosquito entry into the home.
Attachment: Photo - Mosquito Trap

For More Information:
Bob Hart
Vector-Borne Diseases
Grey Bruce Health Unit
519-376-9420 or 1-800-263-3456 ext. 1279







Media Release West Nile Virus.pdf (237 KB)

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