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Investigation of respiratory and dermal symptoms associated with metal working fluids at an aircraft engine manufacturing facility.

Authors
Meza-F; Chen-L; Hudson-N
Source
Am J Ind Med 2013 Dec; 56(12):1394-1401
NIOSHTIC No.
20043282
Abstract
Background: Each year, 1.2 million metalworkers are exposed to metalworking fluids (MWFs), which can cause dermal and respiratory disease. The National Institute for Occupational Safety and Health (NIOSH) conducted a health hazard evaluation of MWF exposures at an aircraft engine manufacturing facility. The objectives were to determine employee exposures to endotoxin and MWFs in the air, characterize symptoms experienced by employees working with MWFs, compare them to symptoms of employees unexposed to MWFs, and make recommendations for reducing exposures based on results. Methods: Four hundred seven workers were categorized as MWF exposed or MWF unexposed and completed questionnaires. Estimated prevalence ratios (PR) of dermatitis, asthma, and work-related asthma (WRA) symptoms were calculated. Airborne concentrations of MWF and endotoxin were measured, and work practices observed. Results: MWF exposed workers had a significantly higher prevalence of dermatitis on wrists/forearms (PR 2.59; 95% CI 1.22, 5.46), asthma symptoms (PR 1.49; 95% CI 1.05, 2.13), and WRA symptoms (PR 2.10; 95% CI 1.22, 3.30) than unexposed workers. Airborne concentrations of MWF were below the NIOSH recommended exposure limit (REL) for MWF aerosols (thoracic particulate mass). Conclusions: Despite MWF exposures below the NIOSH REL, exposed workers had a higher prevalence of asthma, WRA, and dermatitis symptoms than unexposed workers. Recommendations to reduce exposure included configuring mist collectors to automatically turn on when the machine is in use, and enforcing enclosure use.
Keywords
Dermatitis; Skin-exposure; Skin-irritants; Skin-sensitivity; Contact-dermatitis; Epidemiology; Surveillance-programs; Metal-workers; Metalworking; Metalworking-fluids; Metalworking-industry; Fluids; Respiratory-system-disorders; Aircraft; Aircraft-engines; Aircraft-parts-and-auxiliary-equipment; Endotoxins; Bronchial-asthma; Health-surveys; Questionnaires; Work-practices; Employee-exposure; Exposure-assessment; Exposure-limits; Control-methods; Particulates; Bacteria; Fungi; Author Keywords: metalworking fluid; MWF; thoracic particulates; asthma; dermatitis; endotoxin; mycobacteria; microbial contamination; fungi; aircraft engine manufacturing; HETA 2010-0144-3164
Contact
Lilia Chen, MS, CIH, Division of Surveillance, Hazard Evaluations and Field Studies, National Institute for Occupational Safety and Health, 4676 Columbia Parkway, Mailstop R-10, Cincinnati, OH 45226
CODEN
AJIMD8
Publication Date
20131201
Document Type
Journal Article
Email Address
fto3@cdc.gov
Fiscal Year
2014
NTIS Accession No.
NTIS Price
Identifying No.
M112013
Issue of Publication
12
ISSN
0271-3586
NIOSH Division
DSHEFS
Priority Area
Services
Source Name
American Journal of Industrial Medicine
State
OH
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