Lafayette has become the third community in Boulder County to test positive for West Nile Virus and will use a ground-based adulticide against the mosquitoes at Waneka Lake Park on Wednesday night in an effort to combat the potentially deadly disease.

In Boulder County, Lafayette joins Boulder and Longmont as having had pools of mosquitoes test positive for the virus. 

West Nile Virus can cause mild to severe illness, including fever, extreme fatigue and head and body aches. It can also lead to chronic disability, including tremors, vision loss and paralysis.

Lafayette's mosquito pool was collected the week of July 7 from a trap at Waneka Lake Park. Its control efforts Wednesday will begin after 10 p.m.

For more information about the methods Colorado Mosquito Control uses, call 877-276-4306. 

To learn more about how to protect yourself against the virus, visit