VENTURA — The Ventura County Environmental Health Division (Division) received confirmation from the California Department of Public Health that mosquitoes collected from the City of Fillmore on June 17th, 2026, tested positive for West Nile Virus (WNV). WNV is established in Ventura County and additional WNV positives are expected. This is the first mosquito sample collected in 2026 from Ventura County to test positive for WNV. Ventura County Public Health confirms that no human cases have been identified to date in 2026.