Health Alert: Deadly Mosquito Species Resurfaces in Michigan

Local health officials are raising concerns after a mosquito known for spreading deadly diseases has once again been detected in Saginaw County. The Aedes aegypti, also called the yellow fever mosquito, was first found in Mid-Michigan in 2022—and it continues to resurface each summer.

This species isn’t native to Michigan or the Midwest and typically can’t survive our cold winters. However, scientists and health experts have confirmed that this invasive insect has once again been trapped and identified in the region.

Why Aedes Aegypti Is a Concern?

While mosquitoes are always a seasonal nuisance, Aedes aegypti poses a more serious health risk. It’s a known carrier of multiple viruses including Dengue fever, Zika virus, Chikungunya, and Yellow Fever—the illness for which it gets its nickname.

READ MORE: Michigan Homeowners Warned - Don't Touch That Nest

The Saginaw County Mosquito Abatement Commission (SCMAC) refers to this mosquito as a "serious public health nuisance."

How Did It Get to Michigan?

These mosquitoes are usually found in tropical and subtropical climates, so their continued presence in Michigan is both unusual and concerning. According to SCMAC, “The mosquitoes likely came from eggs laid on items like tarps and boats that were brought from the southern U.S.”

Get our free mobile app

Fortunately, the Aedes aegypti mosquito is not yet widespread in Saginaw County, but the fact that it continues to appear has prompted increased monitoring and public awareness efforts.

West Nile Case Reported Locally

In a related update, SCMAC also reported that a crow found locally this month tested positive for West Nile virus, another mosquito-borne disease.

To protect yourself:

• Use EPA-approved insect repellent

• Remove standing water from yards and gutters

• Stay alert by following local and state health updates

The return of this invasive mosquito serves as a reminder that our ecosystems are shifting—and so are the health risks that come with them.