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    Infectious Diseases

    Valley Fever: An Invisible Killer Expands Its Range in the American West

    By Global Biodefense StaffNovember 17, 2023
    A photomicrograph revealed the presence of thin, septate, hyaline hyphae, from which numerous, thick walled, Coccidioides immitis arthroconidia had evolved. The average arthrospore measures 3.0 x 4.5µm, and is barrel-shaped.
    Credit: Dr. Lucille K. Georg, CDC
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    Valley fever has long haunted the American Southwest: Soldiers on dusty military bases, prisoners in wind-swept jails, construction workers pushing new suburbs farther into deserts have all encountered Coccidioides, the flesh-eating fungus that causes Valley fever. But the threat is growing. Cases have roughly quadrupled over the past two decades, according to the Centers for Disease Control and Prevention.

    The fungus thrives in dry soils, rides on plumes of dust and booms after periods of extreme drought — the exact cycles that scientists say have grown more intense and widespread across the American West due to the warming climate.

    In California, where more than 1,000 people are hospitalized with Valley fever each year, the impetus to develop better epidemiological tools is particularly urgent.

    Read the full story at The Washington Post


    SEE ALSO:

    Valley Fever Statistics

    In 2019, there were 20,003 cases of Valley fever reported to CDC. Most of these cases were in people who live in Arizona or California. Rates of Valley fever are typically highest among people age 60 and older. The number of Valley fever cases reported to CDC likely underestimates the true number of Valley fever cases. Tens of thousands more illnesses likely occur and may be misdiagnosed because many patients are not tested for Valley fever. CDC

    Valley Fever: NIH Funds Coccidioidomycosis Collaborative Research Centers

    NIH funding totaling more than $4.5m to UCSF, UCLA and UT San Antonio will support establishment of a Coccidioidomycosis Collaborative Research Center. This effort is the first of its kind, creating a coordinated effort amongst these institutions to fill research gaps on ways to prevent, diagnose and treat Valley Fever. Global Biodefense

    Coccidioides Species: A Review of Basic Research: 2022

    Coccidioides immitis and posadasii are closely related fungal species that cause coccidioidomycosis. These dimorphic organisms cause disease in immunocompetent as well as immunocompromised individuals and as much as 40% of the population is infected in the endemic area. Although most infections resolve spontaneously, the infection can be prolonged and, in some instances, fatal. In patients where the infection is not self-limited, the disease can spread to skin, bone, and the central nervous system among many other organs. Although disseminated disease is unusual, it occurs in both immunocompetent and immunocompromised people, is frequently difficult to treat, and can be fatal. Journal of Fungi

    Emerging Threats Valley Fever
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