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  • Title: Preventing respiratory disease in swine confinement workers: intervention through applied epidemiology, education, and consultation.
    Author: Donham KJ, Merchant JA, Lassise D, Popendorf WJ, Burmeister LF.
    Journal: Am J Ind Med; 1990; 18(3):241-61. PubMed ID: 2220828.
    Abstract:
    A combined epidemiological and intervention study was conducted on 207 swine confinement farmers with matched comparison subjects. The objectives of the study were to define, in detail, the nature and disease determinants in this exposed group and to explore methods of disease prevention. This 5 year prospective study included three annual medical assessments of workers and complementary work environment assessments. Between the first and second assessment periods, an in-depth educational intervention was conducted. An industrial hygiene consultation intervention was conducted between the second and third measurement periods. Outcome measurements included changes in knowledge, attitudes, and behavior following educational intervention. Additionally, the outcomes measured included changes in medical and environmental assessment over the 3 year assessment periods. Results of the baseline respiratory symptoms assessment are reported here. Nearly 20% of swine confinement workers reported chronic cough, and 25% reported phlegm (American Thoracic Society questionnaire). Both symptoms were significantly more prevalent in the confinement workers compared to a blue collar comparison group, but only phlegm production was more prevalent compared to nonconfinement farmers. Work-related symptoms were reported much more frequently than chronic symptoms (e.g., 87% of confinement workers reported work-related cough). Bronchitis as well as airways reactivity were all significantly more prevalent in confinement workers compared to nonconfinement workers. Smoking seemed to have an additive effect with confinement exposure. Bronchitis and chest tightness symptoms were reported to be more severe upon return to work after an absence of 7 days or more. Finally, 34% of workers reported episodes of organic dust toxic syndrome.
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