Surge in Valley Fever Cases in California
Health officials are reporting a sharp rise in cases of Valley fever in California. By the end of July, there were 6,761 confirmed cases, suggesting that 2025 could see even more than the 12,595 cases reported in 2024. Last year’s total marked a record, with the state generally averaging between 7,000 and 9,000 cases annually from 2016 to 2024.
The number of cases may rise further due to delays in reporting. “Valley fever is a serious illness that’s here to stay in California,” stated Erica Pan, director of the California Department of Public Health.
Valley fever, named after the San Joaquin Valley where it is prevalent, is caused by inhaling spores of a fungus called Coccidioides, which lives in the soil. While most cases are found in Southern Arizona and Southern California, the fungus is also common in New Mexico, Nevada, Utah, Texas, and parts of Washington state. Research indicates that dry conditions followed by rainfall can increase the growth of this fungus, scattering spores into the air.
Experts emphasize that certain groups are more at risk, including individuals over 60, those with weakened immune systems, pregnant women, and people with diabetes. Symptoms of Valley fever can resemble those of COVID-19, including fever, chills, fatigue, and general malaise. Severe cases can lead to respiratory issues and complications like meningitis.
Dr. George Thompson from UC Davis Health shared that there has been a notable increase in patients seeking diagnosis and treatment for Valley fever in recent years. He noted symptoms can range from mild discomfort to severe respiratory illness, including chest pain and joint pain.
While not everyone who contracts Valley fever needs treatment, those with severe symptoms or underlying health concerns may require antifungal medications. A blood test can confirm an infection, and imaging tests like X-rays or CT scans can help identify pneumonia.
To minimize risk, people are advised to avoid areas where the soil is disturbed, especially for those in high-risk groups. Wearing an N95 mask in dusty environments is also recommended. Anyone suffering from symptoms lasting over a week, particularly after exposure to dusty areas, should seek medical attention.
With increasing awareness and understanding of Valley fever, health officials stress the importance of prevention and timely diagnosis to manage this growing public health issue.
