Mosquitoes in Wauwatosa test positive for West Nile Virus; what to know

Key Points:

• Mosquitoes in Wauwatosa have tested positive for West Nile virus for the first time since monitoring began in mid-June, though no human cases have been reported in Wisconsin in 2026 so far.
• West Nile virus spreads through bites from infected mosquitoes that have fed on infected birds, and it does not transmit directly between people.
• Most infected individuals show no symptoms, but some may experience fever, chills, headache, muscle aches, rash, and fatigue; severe cases can cause neurological symptoms and are more likely in older adults or those with weakened immune systems.
• To prevent infection, health officials recommend reducing mosquito exposure by using insect repellent, wearing protective clothing, avoiding outdoor activities during peak mosquito hours, and eliminating standing water where mosquitoes breed.
• Additional mosquito-proofing measures include maintaining intact window and door screens, regularly changing water in bird baths and pet dishes, and keeping yards trimmed to reduce mosquito resting areas.