RENO " Nevada health officials say so far there's been no cases this year of West Nile virus.
Still, officials are urging preventive measures to slow the spread of mosquitoes and the potentially fatal disease.
Many health districts drop chemicals into mosquito-prone wetlands areas to prevent mosquito larvae from growing into adults.
Health officials say people can help by eliminating standing water where mosquitoes breed.
They also should wear long sleeves and pants at dawn and dusk and wear insect repellent to avoid being bitten.
In Nevada, the first human case of West Nile was identified in 2005. Since then, 210 people have been infected, and three have died.