So far this summer, at least 44 samples of mosquitoes in Michigan have tested positive for a mosquito-borne illness.
That includes mosquitoes from Wayne, Washtenaw, and Macomb counties.
Health officials say Midland County has already seen triple its yearly average of mosquitoes testing positive for West Nile virus.
One human case has now been reported in Livingston County, and experts say now is the time when the risk tends to rise.
“We tend to see rises in it in late summer, especially in August and September,” said Cleveland Clinic Infectious Disease Specialist Dr. Dumford.
That’s when mosquito populations tend to be largest, and the risk of being exposed increases.
Mosquitoes become infected with the West Nile virus by feeding on the blood of infected birds.
They can then spread the virus by biting people, horses, and other mammals.
About 80% of people infected with the West Nile virus will have no symptoms. Health officials say Midland County has already seen triple its yearly average of mosquitoes testing positive for West Nile virus.
Approximately 20% of individuals may experience symptoms such as fever, muscle aches, nausea, and fatigue.
But in severe cases, West Nile virus can cause brain swelling, muscle weakness, paralysis, or even death.
“One thing to do to prevent West Nile virus and other mosquito-borne illnesses is to try to avoid mosquito bites altogether. If we’re talking specifically about West Nile virus, it’s transmitted by a mosquito that is typically active at those twilight and nighttime hours. So, it’s a good idea, you know, not just at those times, but all throughout the day if you’re going to be outside, apply an EPA-approved mosquito repellent. This is great not just for mosquito-borne illnesses, but also for Lyme disease and other tick-borne illnesses, which we have to worry about in our summer months as well.”
The CDC reports that ER visits for tick bites have also increased this summer in Michigan.