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National Institute of Environmental Health Sciences

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Your Environment. Your Health.

Publication Detail

Title: Mesothelioma associated with commercial use of vermiculite containing Libby amphibole.

Authors: Dunning, Kari K; Adjei, Stephen; Levin, Linda; Rohs, Amy M; Hilbert, Tim; Borton, Eric; Kapil, Vikas; Rice, Carol; Lemasters, Grace K; Lockey, James E

Published In J Occup Environ Med, (2012 Nov)

Abstract: To describe asbestos-related mortality among manufacturing workers who expanded and processed Libby vermiculite that contained amphibole fiber.Standardized mortality ratio was calculated for 465 white male workers 31 years after last Libby vermiculite exposure.Two workers died from mesothelioma, resulting in a significantly increased standardized mortality ratio of 10.5 (95% confidence interval, 1.3 to 38.0). These workers were in the upper 10th percentile of cumulative fiber exposure, that is, 43.80 and 47.23 fiber-years/cm, respectively. One additional worker with cumulative fiber exposure of 5.73 fiber-years/cm developed mesothelioma but is not deceased. There were no other significantly increased standardized mortality ratios.Workers expanding and processing Libby vermiculite in a manufacturing setting demonstrated an increased risk for the development of mesothelioma following exposure to the amphibole fiber contained within this vermiculite ore source.

PubMed ID: 22544163 Exiting the NIEHS site

MeSH Terms: Adolescent; Adult; Aged; Aged, 80 and over; Aluminum Silicates/adverse effects*; Cause of Death; Cohort Studies; Confidence Intervals; Extraction and Processing Industry*; Female; Humans; Inhalation Exposure/adverse effects*; Lung Neoplasms/chemically induced; Lung Neoplasms/mortality*; Male; Mesothelioma/chemically induced; Mesothelioma/mortality*; Middle Aged; Occupational Exposure/adverse effects*; Respiratory Tract Diseases/chemically induced; Respiratory Tract Diseases/mortality; Young Adult

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