Lung function and respiratory symptoms in pig farmers.

Bongers, P.M.; Houthuijs, Danny; Remijn, B.; Brouwer, R.; Biersteker, K.

doi:10.1136/oem.44.12.819

Cited by 50 publications

(63 citation statements)

References 11 publications

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“…This is in accordance with the association found between automated feeding systems and chronic symptoms in our former study [49] and with the slightly lower lung function for farmers with automated systems found in that study and earlier by Bongers and co workers [9]. In another part of our study [37] we showed that wet feeding is associated with lower exposure to dust, as reported also by Attwood and coworkers [2].…”

Section: Discussionsupporting

confidence: 93%

Bronchial hyperresponsiveness and exposure in pig farmers

Vogelzang

Gulden

Preller

et al. 1997

International Archives of Occupational and Environmental Health

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Please be advised that this information was generated on 2018-05-09 and may be subject to change.Int Arch Occiip Environ Health (1997) Abstract Objective: To study the effect of exposure on bronchial responsiveness in pig farmers. Method: A group of 196 pig farmers were tested for lung function and bronchial responsiveness to histamine in the sum mer of 1992. To achieve sufficient contrast in respira tory morbidity and exposure, 96 of the farmers were selected because they had chronic respiratory symp toms and the remaining 100 because they were free from any respiratory symptoms. Personal exposure to dust, endotoxins and ammonia was measured during 1 working day in the summer of 1991 and 1 day in the winter of 1992. Data on farm characteristics were gathered in the same period. Results: After adjusting for age and smoking behaviour, mild bronchial re sponsiveness, defined as PCi0 ^ 16 mg/ml, was asso ciated with the use of quaternary ammonium com pounds as disinfectant [prevalence odds ratio (POR) 6.7, 95% confidence interval (Cl) 1.4-32.8], use of wood-shavings as bedding (POR 13.3, Cl 1.3-136.7), use of automated dry feeding (POR 2.8, Cl 1.0-7.8), use of pellets as feeding material (POR 4.8, Cl L I-21.1) and location of air exhaust via pit or roof in the confinement units (POR 2.7, CI 1.2-6.3). The associa- tion with the use of disinfectants other than quaternary ammonium compounds was not significant (POR 2.4,. No associations between bronchial re sponsiveness and measured exposure to dust, endo toxins or ammonia were discernible. Conclusion: Pro tective measures, designed to prevent airway disease in confinement farming, should be based on information about the operational and other characteristics of farms that are related to high exposure and health ef fects. Specifically, the use of quaternary ammonium compounds as disinfectant, the use of wood-shavings as bedding and the use of automated dry feeding should be discouraged.

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Section: Discussionsupporting

confidence: 93%

Bronchial hyperresponsiveness and exposure in pig farmers

Vogelzang

Gulden

Preller

et al. 1997

International Archives of Occupational and Environmental Health

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“…There are large differences in the report ed incidence of respiratory ailments, such as chronic bronchitis, and in th e functional impairment observed. Som e studies ha ve reported a very high prevalence of cough and sputum production for these workers (2-4), while others found fewer symptomatic subjects (5,6). Similar differences can be found for the number o f subjects with abnormal pulmonary fun ctions (5,7).…”

supporting

confidence: 65%

Respiratory health of workers exposed to swine confinement buildings only or to both swine confinement buildings and dairy barns.

Cormier¹,

Boulet²,

Bédard³

et al. 1991

Scand J Work Environ Health

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“…Various respiratory symptoms have been identi fied among pig farmers in previous studies. For example, a higher prevalence of airway irritation and bronchitis was found in several studies (8,9,12,14,15,17,19,22,23 ), and sometimes a higher pre valence of asthma (1 I, 16) and symptoms of bron chial hyperreactivity (13) were revealed. In the three groups, the mean base-line FVC and FEVl.o were similar to the European reference values.…”

Section: Discussionmentioning

confidence: 99%

“…Bongers et al (9) found me an pulmonary fun ction values, exc ept for PVC, that were lower than the reference value s among 132 pig farm owners. However, con sistent with our study, there was no significant correlation between duration of exposure and pulmonary function .…”

Section: Discussionmentioning

confidence: 99%

Respiratory symptoms and bronchial reactivity among pig and dairy farmers.

Choudat¹,

Goehen²,

Korobaeff³

et al. 1994

Scand J Work Environ Health

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ratory symptoms and bronchial reactivity among pig and dairy farmers. Scand J Work Environ Health 1994;20:48-54. OBJECTI VES -This study assessed the prevalence of respiratory manifestations among French pig and dairy farmers and determined the relationship between bronchial reactivity and respiratory manifestations. METHODS -The pig farmers included 102 men working more than halftime inside swine confinement buildings. There were 51 male dairy farmers and 81 male referents. The demographic characteristics of the three groups were similar except for more smokers among the referents. Each subject completed a standardized questionnaire. Pulmonary function tests were performed before and after a methacholine challenge (cumulative doses 80, 240, and 560 ug), Airborne dust, ammonia, and carbon dioxide were measured inside 28 swine confinement buildings. RESULTS -The pig farmers were exposed to a total dust level of 2.4 I mg . nr-'. The respirable particle concentration was low. The pig and dairy farmers had a significantly higher prevalence of cough and morning phlegm than the referents. Before the methacholine challenge, the dairy farmers had nonsignificantly lower mean lung function values than the other groups. Among the subjects with no history of asthma, nonspecific bronchial hyperreactivity was significantly higher among the pig and dairy farmers than among the referents. There was a fall in the forced expiratory volume in I s (FEY, ,) that was greater than 10% in 6.7% of the referents, 17.9% of the swine workers, and 35.6% of the~airy farmers. This result was unchanged after adjustment for the initial FEV] o: CONCLUSIONS -The prevalence of respiratory symptoms was significantly higher among the pig' farmers without base-line lung function impairment. However, both the pig and the dairy farmers had increased bronchial reactivity.Key terms: agricultural workers, epidemiology, occupational airborne exposure.Epidemiol ogic studi es have demonst rated an increased ri sk of respiratory dysfunction am ong farmers (1---4) and, especially, am ong workers in swine co nfinement building s (5-24). Th ese studi es iden-

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Lung function and respiratory symptoms in pig farmers.

Cited by 50 publications

References 11 publications

Bronchial hyperresponsiveness and exposure in pig farmers

Bronchial hyperresponsiveness and exposure in pig farmers

Respiratory health of workers exposed to swine confinement buildings only or to both swine confinement buildings and dairy barns.

Respiratory symptoms and bronchial reactivity among pig and dairy farmers.

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