Cluster of Pulmonary Blastomycosis in a Rural Community: Evidence for Multiple High-risk Environmental Foci Following a Sustained Period of Diminished Precipitation

Overview

Journal Mycopathologia

Specialties Microbiology
Pharmacology

Date 2002 May 10

PMID 11998870

Citations 12

Authors

Mary E Proctor

Bruce S Klein

Jeffrey M Jones

Jeffrey P Davis

Affiliations

Soon will be listed here.

Abstract

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. dermatititidis among five of 32 family controls.

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