Exposure to asbestos-containing vermiculite ore and respiratory symptoms among individuals who were children while the mine was active in Libby, Montana.

Content Provider	Europe PMC
Author	Vinikoor, Lisa C. Larson, Theodore C. Bateson, Thomas F. Birnbaum, Linda
Copyright Year	2010
Abstract	BackgroundLibby, Montana, was home to the largest vermiculite ore mine in the United States. The processing, use, and transport of the ore, which was contaminated with amphibole asbestos, led to generalized contamination of the community. The mine closed in 1990.ObjectivesWe examined the prevalence of respiratory symptoms in 2000–2001 and their association with history of vermiculite exposure among people who were ≤ 18 years of age when the mine closed.MethodsInformation on respiratory symptoms and exposure history was collected by questionnaire in 2000–2001, at which time participants were 10–29 years old. Logistic regression was used to model the associations between exposures and outcomes adjusted for age, sex, and tobacco smoke exposure.ResultsOf the 1,003 individuals included in the study, 10.8% reported usually having a cough, 14.5% reported experiencing shortness of breath when walking up a slight hill or hurrying on level ground, and 5.9% reported having coughed up bloody phlegm in the past year. These respiratory symptoms were positively associated with frequently handling vermiculite insulation compared with never handling vermiculite insulation. We found no association between vermiculite insulation in the house and respiratory symptoms. Respiratory symptoms were associated with other vermiculite exposures as well, and the number and frequency of these activities showed a positive trend with usually having a cough. We found no association between any of the activities and abnormal spirometry.ConclusionsThese data suggest that residents of Libby, Montana, who were children when the mine closed experienced some respiratory symptoms associated with asbestos-contaminated vermiculite exposure.
ISSN	00916765
Journal	Environmental Health Perspectives
Volume Number	118
PubMed Central reference number	PMC2920904
Issue Number	7
PubMed reference number	20332072
e-ISSN	15529924
DOI	10.1289/ehp.0901680
Language	English
Publisher	National Institute of Environmental Health Sciences
Publisher Date	2010-03-12
Access Restriction	Open
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Subject Keyword	asbestos children Libby Montana respiratory symptoms spirometry vermiculite ore
Content Type	Text
Resource Type	Article
Subject	Health, Toxicology and Mutagenesis Public Health, Environmental and Occupational Health