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Respiratory morbidity of workers exposed to wollastonite through mining and milling.

Authors
Shasby-DM; Peterson-M; Hodous-T; Boehlecke-B; Merchant-J
Source
Dusts and Disease, Proceedings of the Conference on Occupational Exposures to Fibrous and Particulate Dust and their Extension into the Environment, Sponsored by the Society for Occupational and Environmental Health and U.S. Mine Safety and Health Administration; R. Lemen, and J. M. Dement, editors, Park Forest South, Illinois, Pathofox Publisher, Inc. 1979 Jan; :251-256
Link
NIOSHTIC No.
00096323
Abstract
Workers at an unspecified wollastonite (10101390) mine and mill were studied for incidences of respiratory disorders. Environmental samples were collected and analyzed for free silica and trace metal content, and wollastonite fiber concentrations were determined. Among the 104 men included in the study, the mean duration of wollastonite exposure was 9.2 years. Workers completed medical and occupational history questionnaires, and received spirometry tests, chest X-rays, physical examinations, and respiratory function tests. The median fiber diameter was 0.22 micrometers with a median length of 2.5 micrometers. Fiber counts by phase contrast microscopy showed concentrations of 0.3 fibers per cubic centimeter (cc) in the mine and 23.3 fibers per cc in the mill. Twenty three percent of smokers and exsmokers had symptoms of chronic bronchitis, although the prevalence did not increase with increasing exposure to wollastonite. Only one worker showed significantly reduced forced vital capacity (FVC). FVC and total lung capacity findings did not correlate with duration of exposure. Spirometry and X-ray findings were normal. The authors conclude that due to the small number of workers in the study and the relatively short exposure history, results of this study should be interpreted with caution. Further followup studies of exposed workers are recommended.
Keywords
Respiratory-system-disorders; Dust-exposure; Fibrous-bodies; Fibrous-dusts; Measurement-methods; Air-sampling; Sampling; Physical-properties; Epidemiological-studies; Disease-rates;
CAS No.
10101-39-0;
Publication Date
19790101
Document Type
Conference/Symposia Proceedings
Editors
Lemen-R; Dement-JM
Fiscal Year
1979
NTIS Accession No.
NTIS Price
ISBN No.
0930376080
NIOSH Division
ALOSH
Source Name
Dusts and Disease, Proceedings of the Conference on Occupational Exposures to Fibrous and Particulate Dust and their Extension into the Environment, Sponsored by the Society for Occupational and Environmental Health and U.S. Mine Safety and Health Administration; R. Lemen, and J. M. Dement, editors, Park Forest South, Illinois, Pathofox Publisher, Inc.
State
IL; WV
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