The Epidemiological Features of Invasive Mycotic Infections in the San Francisco Bay Area, 1992-1993: Results of Population-Based Laboratory Active Surveillance

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Population-based active laboratory surveillance for invasive mycotic infections was conducted during 1992 and 1993 in three California counties: Alameda, Contra Costa, and San Francisco (population, 2.94 million). The cumulative incidence of invasive mycotic infections was 178.3 per million per year. Invasive mycoses were most commonly caused byCandida(72.8 per million per year),Cryptococcus(65.5),Coccidioides(15.3),Aspergillus(12.4),andHistoplasma(7.1). The clinical significance of other, less common fungi was determined by detailed chart review. The cumulative incidence was determined for zygomycosis (1.7 per million per year), hyalohyphomycosis (1.2), and phaeohyphomycosis (1.0). The most common underlying conditions were human immunodeficiency virus infection (47.4%), nonhematologic malignancy (14.7%), diabetes mellitus (9.9%), and chronic lung disease (9.3%). This represents the first population-based epidemiological assessment of invasive mycoses in the United States.

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