West Nile virus detected in mosquitoes in Oregon

PORTLAND, Ore. (KOIN) — Mosquitoes carrying the West Nile virus have been identified in Oregon for the first time this year, according to the Oregon Health Authority.

Health officials say three pools containing up to 50 mosquitoes tested positive for the virus in Malheur County, with the county’s own health department stating the samples were collected in Little Valley.

West Nile virus is spread through the bite of an infected mosquito. While OHA says most of those infected don’t become sick, 20% experience flu-like symptoms, including fever, headaches, stiff neck, confusion, muscle weakness, shaking, paralysis or rash.

Officials say anyone experiencing these symptoms should seek medical attention, as the virus can sometimes leading to serious illness or death. West Nile also presents a severe risk to people aged 55 and older, those who are immuno-compromised, as well as people with diabetes or high blood pressure.

Further, there are currently no vaccines against the virus or medicines to treat it in people, OHA says.

As mosquitoes breed and thrive in warm temperatures – especially in summer heat – OHA offered the following tips to prevent mosquito bites in case they carry the virus:

• Apply insect repellent to exposed skin. OHA recommends products containing DEET, oil of lemon eucalyptus or Picaridin.
• Avoid applying repellent to children’s hands because it can irritate the eyes and mouth.
• Wear long-sleeved shirts and long pants when outdoors.
• Place mosquito netting over infant carriers when outdoors with infants.
• Consider staying indoors at dawn and dusk, as these are peak mosquito biting times.
• Install or repair window and door screens so mosquitoes cannot get inside.

OHA added that last year, a total of 21 mosquito pools tested positive throughout the state. But most were concentrated in eastern and southern Oregon in mid-July.