Two people have died of the West Nile virus in Minnesota this year out of 20 reported cases and the state is warning people to protect against mosquito bites.
The number of cases each year depends on variables such as heat and rainfall. The recent increase in cases has prompted the Minnesota Department of Health to issue a warning.
The disease is transmitted through the bite of an infected mosquito. In most cases, state health officials said, people bitten by an infected mosquito will have no symptoms or mild flu-like symptoms. However, less than 1% of those infected develop encephalitis or meningitis within one to two weeks. There is no treatment for the illness other than supportive care, health official said.
Elderly people and those with weakened immune systems are at greatest risk, followed by those who work outside or engage in outdoor activities.
Although cases of the virus have been found throughout the state, the highest risk areas are agricultural regions in western and central Minnesota.
“This is a high-risk time of year for West Nile virus transmission,” said Elizabeth Schiffman, supervisor of the Health Department’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.”
State health officials provided the following tips to protect against infection:
Use insect repellents that are registered by the Environmental Protection Agency and contain up to 30% DEET.
Pre-treat clothing and gear with permethrin-based products.
Wear loose-fitting, long-sleeved shirts and pants.
Be extra cautious or avoid outdoor activities at dusk and dawn, the peak feeding time for many mosquitoes, particularly from July through September.
Keep mosquitoes out of your home by maintaining screens on windows and doors.
For more information, visit health.state.mn.us/diseases/westnile.
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