Tazewell County Health Department reported Thursday there have been four cases of West Nile virus in birds, including Delavan, Pekin, Washington and Morton. West Nile is transmitted through the bite of a mosquito that has contracted the virus by feeding on an infected bird. Common symptoms include fever, nausea, headache and muscle aches and may last a few days to a few weeks. Additional information about West Nile can be found on the Illinois Department of Public Health's website at www.idph.state.il.us/envhealth/wnv.htm.
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