MORRISON – The Whiteside County Health Department found mosquitoes in Morrison that tested positive for West Nile virus.
The department had been testing culex mosquitoes in the county's populated areas.
"The presence of West Nile virus in the county is not a cause for alarm, but it is cause for a renewed awareness and vigilance," Environmental Health Director Gene Johnston said in a statement.
The culex mosquito is a dusk-to-dawn biter. Officials encourage people out after dark to wear long-sleeved shirts, long pants, socks and hats. They should also use repellent that contains DEET. The higher the percentage of DEET, the longer it works as protection against mosquitoes.
Also, people should eliminate all sources of standing water, where mosquitoes can breed.
West Nile virus symptoms include fever, nausea, headache and muscle aches.