Valley fever is becoming more widespread in California, with over 5,500 provisional cases reported in the first half of 2025. This fungal infection, previously confined to the Central Valley, is appearing more frequently in the Bay Area. While most cases are mild, there is a notable increase in severe cases. Climate change, particularly longer dry summers and dust storms, is intensifying its spread. Experts advocate for better awareness and diagnostic testing, as valley fever remains underreported across the state.
"Approximately 30% of rodent holes in the Carrizo Plain National Monument have coccidioidomycosis, or valley fever, which is increasingly affecting California beyond the Central Valley."
"California surpassed 5,500 provisional cases of valley fever in the first six months of 2025, indicating a potential record level of the disease."
"Dr. Stuart Cohen reports a concerning trend of more severe valley fever cases, even among otherwise healthy individuals, along with an increase in overall case numbers."
"Research indicates that climate change-related dust storms are contributing to the spread of valley fever by transporting fungal spores over larger distances."
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