Two of the 20 West Nile virus cases reported in Minnesota so far this year have resulted in death, according to state health officials.The Minnesota Department of Health (MDH) is encouraging people to take precautions given the recent increase in cases, which vary each year due to factors including heat and rainfall.Cases have been found throughout Minnesota, but the highest risk areas are agricultural regions in the western and central parts of the state. Other states including Iowa and North and South Dakota have also seen increased activity.West Nile virus is transmitted to people through the bite of an infected mosquito. Dusk and dawn are the peak feeding time for many mosquitoes, particularly from July through September.“This is a high-risk time of year for West Nile virus transmission," said Elizabeth Schiffman, supervisor of MDH’s Vectorborne Diseases Unit. "It’s important to prevent mosquito bites when people are enjoying time outside while the weather is still nice. That’s the best way to avoid getting West Nile virus."MDH's tips for protecting yourself from West Nile:Use insect repellent with up to 30% DEETWear loose-fitting, long-sleeved shirts and pantsBe extra cautious or avoid outdoor activities at dusk and dawnMaintain screens on windows and doors to keep mosquitos out of your homePre-treat clothing and gear with permethrin-based productsJim Stauffer, FlickrMost people who are bitten by an infected mosquito will either experience no symptoms or a mild flu-like illness that typically shows up in one to two weeks. Less than 1% of people develop encephalitis or meningitis, inflammation of the brain or surrounding tissues.Elderly people and others with weakened immune systems are at greatest risk. People who work outside or participate in outdoor activities should also be especially careful.There's no treatment for West Nile virus other than supportive care.
Mosquito SeasonWest Nile VirusMinnesota Department of HealthMinnesota