articleThe Brief Mosquitoes in Wauwatosa tested positive for West Nile virus. Recent tests confirm that mosquitoes gathered in Wauwatosa carry the West Nile Virus. This marks the first batch of Wauwatosa mosquitoes to test positive since tracking began in mid-June. How does West Nile virus spread? FREE DOWNLOAD: Get breaking news alerts in the FOX LOCAL Mobile app for iOS or AndroidWhat are West Nile virus symptoms?