Factors determining the exposure of dairy farmers to thoracic organic dust

Environmental Research
Hugo PfisterLaurent Vernhet

Abstract

Bronchial respiratory diseases are more common in dairy farmers than in the general population, perhaps because the repeated inhalation of organic dust contributes to the development of these disorders. However, the factors determining the exposure of farmers to particles that can enter the lower bronchial tract and interact with it, i.e. the thoracic fraction of the inhalable dust, remain to be identified. We therefore measured the exposure of dairy farmers to thoracic organic dust and identified the farm features and tasks that increased exposure. We measured thoracic particles (n = 110) and farm characteristics and occupational tasks in 29 Brittany dairy farms. The mean (GM) (geometric standard deviation, GSD) concentration of thoracic dust in air inhaled by farmers was 0.24 mg/m3 (2.8) and the concentrations of endotoxins, Gram-positive bacteria and fungi in the thoracic fraction were 128 EU/m3 (4.0), 960 CFU/m3 (6.3) and 690 CFU/m3 (5.4), respectively. Model-based estimates of the association between exposure, farm features and tasks indicated that manual grain and feed handling and mechanical bedding spreading significantly increased exposure to thoracic dust, endotoxins, bacteria and fungi. Exposure to bacteria and fungi...Continue Reading

Citations

Sep 11, 2020·Archives of Toxicology·V LiebersM Raulf
Mar 30, 2020·Journal of Occupational and Environmental Medicine·Sheena E MarteniesSheryl Magzamen
Aug 28, 2020·Environmental Research·Thibaud SoumagneJean-Charles Dalphin
Jun 25, 2021·Toxicology in Vitro : an International Journal Published in Association with BIBRA·Maria-Viola MartikainenMarjut Roponen
Jul 20, 2021·Clinical Immunology : the Official Journal of the Clinical Immunology Society·Sophia KeddacheThibaud Soumagne

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