Ten percent of adults hospitalized with community-acquired pneumonia in Phoenix who were tested for Valley fever tested positive, and roughly one in four such patients was never tested at all, according to a review of a year of hospital records by Mayo Clinic researchers.
The analysis covered 1,141 adults admitted to Mayo Clinic Hospital in Phoenix with community-acquired pneumonia between November 2024 and October 2025. Of those, 76 percent received testing for Coccidioides, the soil fungus that causes the infection, and 10 percent of the tested group had positive results. The findings were published in Open Forum Infectious Diseases.
