West Nile virus discovered in mosquito pools in Malheur County

West Nile virus discovered in mosquito pools in Malheur County
File photo (AP Photo/Sang Tan)

MALHEUR COUNTY, Oregon (KBOI) - West Nile virus has been discovered in two mosquito pools in eastern Oregon.

Health officials say the virus was found in the Harper/Little Valley area in Malheur County on Friday.

Oregon State University's College of Veterinary Medicine found the virus Friday evening in two mosquito pools from Harper/Little Valley area of the county.

Malheur County Health director Stephanie Dockweiler, said there is a potential risk of infection, and mosquitoes have been making their presence known thanks to a mild winter and high springtime temperatures.

Eighty percent of people infected with West Nile virus exhibit no symptoms. Of the remaining 20 percent, most have very mild symptoms such as fever, headaches and nausea lasting from three to six days.

In a few cases, more severe symptoms occur, including convulsions or disorientation. The central nervous system also may be affected, resulting in a headache associated with fever, aseptic meningitis or encephalitis.