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Blastomycosis has traditionally been thought of as a disease of the upper midwestern and southern U.S., a designation based on sporadic cases, outbreaks, and data from the five states that mandate reporting. Recent observations indicate that blastomycosis may be more common in the northeastern U.S. than realized.
To assess the epidemiology of blastomycosis in Vermont, investigators for CDC and the Vermont Department of Health used ICD-10 data from commercial insurance claims in a retrospective cohort analysis of all patients with a diagnosis of blastomycosis from 2011–2020. Among the 114 patients identified (59% male; median age, 55 years), 30% required hospitalization and 4 deaths were attributable to blastomycosis. The highest disease inci…