In 2013, there were two confirmed WNV cases in Pinal County; statewide there were 62 confirmed cases, with six fatalities.
Humans can contract West Nile virus from a mosquito bite. Infected mosquitoes get the virus from feeding on infected birds. The virus can cause serious illness or death. West Nile neuroinvasive disease symptoms include stiff neck, visual problems, body tremors, mental confusion, memory loss and seizures. The milder form of the illness is West Nile fever. Symptoms include fever, headache, muscle and bone aches, nausea and drowsiness.
People with the milder form of illness typically recover on their own, although symptoms may last for several weeks. Up to 80 percent of people infected with West Nile virus will have no symptoms and will recover on their own.
The intensity of West Nile virus activity fluctuates from year to year and depends on a variety of factors including the weather, the numbers of birds and mosquitoes that maintain and spread the virus and human behavior. The season can last up until the first hard freeze of the year.
There are no medications to treat or vaccines to prevent West Nile virus infection. People over 50 years old and those with compromised immune systems are at a higher risk of becoming seriously ill when they become infected with the virus. If people have symptoms that cause them concern, they should contact their healthcare provider.
To reduce exposure to West Nile virus:
•Use an approved insect repellent every time you go outside and follow the instructions on the label. Approved repellents are those that contain DEET, picaridin or oil of lemon eucalyptus.
•Regularly drain standing water, including water collects in empty cans, tires, buckets, clogged rain gutters and saucers under potted plants. Mosquitoes breed in stagnant water.
•Wear long sleeves and pants at dawn and dusk when mosquitoes are most active.
•Use air conditioning or make sure there are screens on all doors and windows to keep mosquitoes from entering the home.