Mosquito tests positive for West Nile Virus in Mitchell, Ont.

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Perth County has had it's first positive finding of West Nile Virus.

"Detecting the first human case of West Nile Virus this year serves as a great reminder for Pennsylvanians to take the proper precautions when they are outside or near areas where mosquitoes are prevalent", Acting Secretary of Health and Physician General Dr. Rachel Levine said.

"West Nile virus activity has been low so far across Ontario, but it's not surprising to see activity begin to increase as historically we get positive mosquito pools around this time", says Stephanie Carlisle, a public health inspector.

WNV is a mosquito-borne disease that can cause encephalitis, a brain inflammation.

The West Nile Virus can be carried by infected birds and then spread locally by mosquitoes that bite those birds.

Of those who show symptoms, most will experience mild illness, including fever, headache, body ache, nausea, vomiting and rash on the chest, stomach or back.

About 1 in 150 will get seriously ill, with symptoms like high fever, vision loss, muscle weakness and coma. These symptoms may last several weeks, and neurological effects may be permanent.

Symptoms usually develop two to fifteen days after being bitten by an infected mosquito. The department of health recommends that people hanging outdoors use insect repellent and cover skin with lightweight clothing when possible. To keep mosquitoes from entering a home, make sure window and door screens are in place and are in good condition.

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