“During wildfire season, we get patients admitted to the hospital with unusual infections that they shouldn’t really be at risk of.”
, some with serious enough cases to develop respiratory failure and meningitis. In both episodes, the firefighters were either enveloped in dust and smoke or doing earthmoving—digging ditches and firebreaks; they told the two sets of investigators that they weren’t given any respiratory protection. So their infections might have come from spores inhaled in smoke or from dust and dirt containing fungi that were kicked up by their digging.
But proximity to dust and dirt probably can’t explain the surge in invasive fungal infections—mold, valley fever, and aspergillosis, from a fungus that thrives in decaying vegetation—that researchers from federal agencies and the University of California, San Francisco documented in everyday people who were admitted to 22 California hospitals following that fire in 2017.
Hauser has set up a monitoring project that places air-sampling equipment on the trucks and equipment of regional firefighting departments, and also around the Davis campus and in Sacramento. By comparing the microbes the devices capture, she may be able to narrow down whether similar exposures occur both at the front lines of fires and in cities bathed in smoke—or whether fungal infections in residents arise from local sources instead.
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