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American Journal of Epidemiology Vol. 110, No. 2: 156-161
Copyright © 1979 by The Johns Hopkins University School of Hygiene and Public Health

research-article

PULMONARY HISTOPLASMOSIS ASSOCIATED WITH EXPLORATION OF A BAT CAVE1

RICHARD LOTTENBERG, R. H WALDMAN2, L AJELLO, G. L. HOFF, WILLIAM BIGLER and S. R. ZELLNER

2 Requests for reprints to Dr Robert H. Waldman, Department of Medicine, West Virginia University, Morgantown, WV 26506

Approximately 14 days after exploring a limestone cave in northcentral Florida in February 1973, an 18-year-old female developed a respiratory illness with pronounced shortness of breath and cyanosis. The following day, an 18-year-old male presented to the hospital with similar complaints. The association of illness with their recent caving experience prompted further epidemiologic investigation. Twenty-nine members of a church-sponsored youth group explored the implicated cave. Twenty-three of them later became ill with complaints of cough, afternoon fever and sweats, chest discomfort, and dyspnea on exertion. Histoplasmin skin tests were positive in 18 of 24 individuals tested. Serum for complement fixation (CF) was positive in 12 of 26. Testing of area residents revealed a low incidence of skin test and CF positivity (7% and 0%, respectively). That spelunkers are at risk of acquiring pulmonary histoplasmosis has been noted previously; in Florida this has been related to the exploration of caves infested with bats. This is the largest reported outbreak of acute pulmonary histoplasmosis that has been associated with spelunking and further points out that only those individuals who enter the cave are at risk of acquiring the disease, and not those who reside in the surrounding area.

bats; histoplasmosis; outbreaks

1 From the Department of Medicine, University of Florida, Gainesville, FL; West Virginia University, Morgantown, WV; and the Mycology Division, Center for Disease Control, Atlanta, GA


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