Idaho’s first two human cases of West Nile virus infection for 2019 have been confirmed in residents of Washington County in western Idaho. A resident over the age of 30 was diagnosed with West Nile virus neuroinvasive disease. Another resident over the age of 60 was diagnosed with West Nile virus fever.

So far this year, WNV activity has been detected in 10 counties.

“The detection of West Nile virus-positive mosquitoes has increased significantly during the last few weeks, and we strongly encourage Idahoans to fight the bite of mosquitoes to protect themselves and their families,” says Dr. Leslie Tengelsen, state public health veterinarian.