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Fallowed Fields Tied to Valley Fever

California surveillance data reveal associations between land use and coccidioidomycosis incidence

  • September 9, 2026

  • 3 min

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  • 1

    A population-based study linked natural landscapes and fallowed farmland to coccidioidomycosis incidence in California.

  • 2

    The study analyzed 65,657 confirmed Valley fever cases reported from April 2008 to March 2021.

  • 3

    Incidence peaked in Kern County, with reported cases rising from 1,708 in 2008 to 9,778 in 2017.

  • 4

    Newly fallowed land and land fallowed in the previous 4 years were associated with higher coccidioidomycosis incidence.

  • 5

    The study did not determine the presence of Coccidioides in agricultural soils or dust, nor did it assess diagnostic methods.

Original Source(s)

Fallowed Fields Tied to Valley Fever

  • September 9, 2026

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