Map of Wisconsin with Asian Tiger Mosquito overlay, indicating risk areas.

Mosquito Alert: The Asian Tiger Mosquito Has Arrived in Wisconsin – What You Need to Know

Elliot Brynn in Health & Wellness December 2025 • 4 min read.

"The invasive Aedes albopictus has been detected in Wisconsin, raising concerns about potential disease transmission. Learn about the risks, prevention, and what this means for public health."

The emergence and spread of mosquito-borne diseases are a growing concern across the globe. The 2015-2016 Zika virus epidemic in the Americas put many regions on high alert, prompting increased surveillance and preventative measures. Among the mosquitoes of greatest concern is Aedes albopictus, commonly known as the Asian tiger mosquito, due to its ability to transmit diseases and adapt to various environments.

Until recently, Wisconsin was not considered a primary habitat for Aedes albopictus. However, a recent study conducted by the University of Wisconsin Medical Entomology Laboratory in collaboration with the Wisconsin Department of Health Services has confirmed the presence of this mosquito in the state. This discovery marks a significant shift in the region's public health landscape and necessitates greater awareness and proactive strategies.

This article breaks down the key findings of the study and explores the implications of Aedes albopictus in Wisconsin. We'll cover identification, risks, prevention, and what you can do to protect yourself and your community.

What Makes Aedes Albopictus a Concern?

Map of Wisconsin with Asian Tiger Mosquito overlay, indicating risk areas.

Aedes albopictus is not just another mosquito. Originally from Southeast Asia, this species has rapidly spread across the world, largely due to international trade and transportation. They're highly adaptable and can thrive in urban, suburban, and rural environments, making containment a challenge.

Here's why Aedes albopictus raises public health concerns:

Disease Transmission: Aedes albopictus is a known vector for several viruses, including Zika, dengue fever, and chikungunya. While these diseases are not currently widespread in Wisconsin, the presence of a competent vector increases the risk of potential outbreaks.
Aggressive Biting Behavior: Unlike some mosquitoes that primarily feed at dawn or dusk, Aedes albopictus is a daytime biter, increasing the likelihood of human contact. Their bites can be painful and irritating, impacting outdoor activities and quality of life.
Adaptability: These mosquitoes lay their eggs in small containers of water, such as discarded tires, flower pots, and even bottle caps. This adaptability allows them to thrive in close proximity to human populations and makes control efforts more difficult.

Understanding these risks is the first step in taking proactive measures to protect yourself and your community.

Protecting Wisconsin from the Asian Tiger Mosquito

The arrival of Aedes albopictus in Wisconsin is a call to action. By understanding the risks and implementing effective prevention strategies, we can work together to minimize the impact of this invasive species and protect public health. Stay informed, take precautions, and participate in community efforts to keep Wisconsin mosquito-safe.

About this Article -

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Everything You Need To Know

What exactly is Aedes albopictus, and why is its presence in Wisconsin a cause for concern?

Aedes albopictus, commonly known as the Asian tiger mosquito, is an invasive mosquito species originally from Southeast Asia. Its detection in Wisconsin is concerning because it is a competent vector for several viruses, including Zika, dengue fever, and chikungunya. While these diseases are not currently widespread in Wisconsin, the presence of Aedes albopictus increases the risk of potential outbreaks. Furthermore, Aedes albopictus exhibits aggressive daytime biting behavior and adapts easily to urban, suburban, and rural environments, making its control difficult. The adaptability of Aedes albopictus is a significant factor; they lay their eggs in small containers of water, allowing them to thrive near human populations.

How does Aedes albopictus differ from other mosquito species I might encounter in Wisconsin, and why does this difference matter?

Aedes albopictus differs from many native mosquito species due to its aggressive daytime biting behavior; most native species are dawn or dusk biters. This increases the likelihood of human contact and disease transmission. Also, Aedes albopictus is a competent vector for viruses like Zika, dengue fever, and chikungunya, which are not typically concerns with native mosquito species in Wisconsin. Aedes albopictus lays eggs in small containers of water, enabling them to thrive in close proximity to human populations, unlike some native species that require larger bodies of water. The adaptability of Aedes albopictus to breed in various environments also distinguishes it, making control efforts challenging.

What specific diseases can Aedes albopictus transmit, and what are the potential health implications for Wisconsin residents?

Aedes albopictus is a known vector for several viruses, including Zika, dengue fever, and chikungunya. Although these diseases are not currently widespread in Wisconsin, the presence of Aedes albopictus increases the risk of potential outbreaks. Zika virus can cause severe birth defects if contracted during pregnancy. Dengue fever causes flu-like symptoms and, in severe cases, can lead to hospitalization and even death. Chikungunya causes fever and joint pain, which can be debilitating and long-lasting. The introduction of Aedes albopictus means local transmission of these diseases becomes possible, posing a direct threat to public health and requiring heightened vigilance and preventative measures.

What steps can Wisconsin residents take to protect themselves and their community from Aedes albopictus?

Residents can take several proactive steps to minimize the impact of Aedes albopictus. Eliminate standing water around homes by emptying containers like discarded tires, flower pots, and bottle caps where Aedes albopictus lay their eggs. Use insect repellent containing DEET, picaridin, or other EPA-approved ingredients when outdoors, especially during the day. Wear long sleeves and pants when possible to reduce skin exposure. Ensure window and door screens are in good repair to prevent mosquitoes from entering homes. Participate in community efforts to monitor and control mosquito populations, and stay informed about local health advisories and recommendations. Reporting mosquito breeding sites can also help control efforts.

How did the University of Wisconsin Medical Entomology Laboratory and the Wisconsin Department of Health Services collaborate to identify Aedes albopictus, and what does this discovery imply for future public health strategies in the state?

The University of Wisconsin Medical Entomology Laboratory and the Wisconsin Department of Health Services collaborated on a study that confirmed the presence of Aedes albopictus in Wisconsin. This discovery signifies a need for enhanced mosquito surveillance and control efforts across the state. Public health strategies must now include targeted interventions to manage Aedes albopictus populations, such as increased monitoring of breeding sites and public education campaigns. Resources will need to be allocated for research to better understand the mosquito's distribution, behavior, and potential for disease transmission in Wisconsin. Collaboration between state agencies, local health departments, and the public is crucial for effective prevention and control. Long-term planning should incorporate strategies to mitigate the risk of mosquito-borne diseases and protect public health.