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West Nile Virus activity confirmed in Stanislaus and Merced counties
West Nile spraying
A twin-engine aircraft contracted by the Merced County Mosquito Abatement District flies over Gustine on Oct. 2, during an aerial treatment to reduce adult mosquito populations. The evening operation targeted Los Banos and Gustine between 6:45 and 11:45 p.m. as part of countywide efforts to curb the spread of West Nile virus (Photo contributed).
West Nile virus activity has been confirmed in both Stanislaus and Merced counties in 2025, prompting increased mosquito control efforts and public health advisories.