Tuolumne County Confirms First Human West Nile Virus Case of 2026
Health officials in Tuolumne County reported the state's first confirmed human West Nile virus infection for 2026, urging residents to follow mosquito-bite prevention measures.
The Tuolumne County public health department confirmed that an adult patient was hospitalized with West Nile virus, marking the first human case reported in the county for 2026. No further personal information was released due to medical privacy rules.
"This case is a reminder of the risks from West Nile Virus-infected mosquito bites," said Tuolumne County Health Officer Dr. Kimberly Freeman. "It is important to learn and follow the recommendations to lower your risk of being bitten by mosquitoes." West Nile virus is spread through mosquito bites; most infections are asymptomatic, while about 20% of people develop fever, headache, body aches, joint pain, vomiting, diarrhea, or rash. Severe disease occurs in fewer than one percent of cases, primarily affecting individuals over 50 or those with weakened immune systems. The California Department of Public Health notes that statewide West Nile virus activity is at its highest level in five years, with August and September identified as peak transmission months. Officials recommend using DEET-based insect repellent, wearing long clothing during dawn and dusk, and eliminating standing water where mosquitoes breed.