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Dose-response relationships between occupational aerosol exposures and cross-shift declines of lung function in poultry workers: recommendations for exposure limits.

Authors
Donham-KJ; Cumro-D; Reynolds-SJ; Merchant-JA
Source
J Occup Environ Med 2000 Mar; 42(3):260-269
NIOSHTIC No.
20032752
Abstract
Numerous articles have been published regarding the adverse respiratory health consequences of working in intensive livestock and poultry housing. Threshold limit exposure guidelines are not currently applied to this environment, but they are essential to implement and monitor effective environmental controls. Previous dose-response research work with swine workers has resulted in exposure limit recommendations of 2.5 mg/m(3) total dust, 0.23 mg/m(3) respirable dust, 100 EU/m(3) endotoxin, and 7 ppm ammonia. No similar recommendations have been reported previously for poultry workers. Therefore, an industry-wide study was conducted to examine dose-response relationships of bioaerosol exposures and worker respiratory health. A total of 257 poultry workers were studied for respiratory symptoms, pulmonary function, and exposure to dust (total and respirable), endotoxin (respirable and total), and ammonia. Details of the sampling plan and environmental assessment are described elsewhere. Relationships between exposures and response were studied by correlation and multiple regressions. Significant dose-response relationships were observed between exposures and pulmonary function decrements over a work shift. Exposure concentrations associated with significant pulmonary function decrements were as follows: 2.4 mg/m(3) total dust, 0.16 mg/m(3) respirable dust, 614 EU/m(3) endotoxin, and 12 ppm ammonia.
Keywords
Agriculture; Agricultural-workers; Agricultural-processes; Environmental-contamination; Environmental-exposure; Environmental-factors; Respiration; Respiratory-function-tests; Respiratory-irritants; Respirable-dust; Pulmonary-disorders; Pulmonary-function; Pulmonary-function-tests; Pulmonary-system; Pulmonary-system-disorders; Work-environment; Workplace-studies; Work-areas; Dust-inhalation; Dust-exposure; Dust-measurement; Dust-particles; Dusts; Dust-sampling; Dust-counting; Dust-collection; Dust-analysis; Particle-aerodynamics; Particulate-dust; Particle-counters
Contact
KJ Donham, University of Iowa, Department of Preventive Medicint & Environmental Health, 100 Oakdale Campus 124 IREH, Iowa City, IA 52242
CODEN
JOEMFM
Publication Date
20000301
Document Type
Journal Article
Fiscal Year
2000
NTIS Accession No.
NTIS Price
Issue of Publication
3
ISSN
1076-2752
NIOSH Division
OD
Source Name
Journal of Occupational and Environmental Medicine
State
IA; DC
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