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Particulate Matter, Endotoxin, and Worker Respiratory Health on Large Californian Dairies
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1 2015
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Source: J Occup Environ Med. 57(1):79-87
[PDF-208.08 KB]
Details:
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Alternative Title:J Occup Environ Med
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Personal Author:
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Description:Objective:
To assess respiratory exposures and lung function in a cross-sectional study of California dairy workers.
Methods:
Exposure of 205 dairy and 45 control (vegetable processing) workers to particulate matter and endotoxin was monitored. Pre- and postshift spirometry and interviews were conducted.
Results:
Geometric mean inhalable and PM2.5 concentrations were 812 and 35.3 [mu]g/m3 versus 481.9 and 19.6 [mu]g/m3, respectively, for dairy and control workers. Endotoxin concentrations were 329 EU/m3 or 1122 pmol/m3 and 13.5 EU/m3 or 110 pmol/m3, respectively, for dairy and control workers. In a mixed-effects model, forced vital capacity decreased across a work shift by 24.5 mL (95% confidence interval, −44.7 to −4.3; P = 0.018) with log10 (total endotoxin) and by 22.0 mL (95% confidence interval, −43.2 to −0.08; P = 0.042) per hour worked.
Conclusions:
Modern California dairy endotoxin exposures and shift length were associated with a mild acute decrease in forced vital capacity.
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Source:
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Pubmed ID:25563544
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Pubmed Central ID:PMC9491493
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