Journal
MYCOPATHOLOGIA
Volume 153, Issue 3, Pages 113-120Publisher
SPRINGER
DOI: 10.1023/A:1014515230994
Keywords
Blastomyces dermatitidis; cluster investigation; fungal infection; pulmonary disease
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Much of our understanding of the epidemiologic features of infection with Blastomyces dermatitidis has come from cluster and outbreak investigations which have established the association of human disease with recreational pursuits and the presence of infectious microfoci in areas of moist soil with high organic content. This report describes the clustering of eight cases of pulmonary blastomycosis without an apparent common source exposure which occurred during a 90 day period in a 96 square mile area (population 4,450) within Oconto County, Wisconsin. We conclude that multiple high-risk environmental foci may have existed following a sustained five-year period of diminished precipitation in the cluster area. A case-control study which included family and community controls concluded that multiple earth-disturbing activities engaged in by case-patients was statistically associated with illness. Lymphocyte-proliferation assays of whole blood samples detected previously unrecognized infection with B. dermatitidis among five of 32 family controls.
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