Endotoxin Exposure as a Major Determinant of Lung Function Decline in Pig Farmers

P.F.J. Vogelzang, Joost W. J. van der Gulden, HANS FOLGERING, JAN J. KOLK, Dick Heederik, Liesbeth Preller, M.J.M. Tielen, Constant P. van Schayck

American Journal of Respiratory and Critical Care Medicine · 1998 · 229 citations · 32 references

Concepts

Abstract

Exposure-response relationships for endotoxin as measured in dust and longitudinal decline in lung function were studied. A cohort of 171 pig farmers was followed over a 3-yr period. Long-term average exposure to dust and endotoxin was determined by personal monitoring in summer and winter, using data on farm characteristics and activities. Mean decline in FEV1 was 73 ml/yr and in FVC 55 ml/ yr. Long-term average exposure to dust was 2.63 mg/m3 (geometric SD [GSD] 1.30), and to endotoxin, 105 ng/m3 (GSD 1.5). Annual decline in FEV1 was significantly associated with endotoxin exposure. An increase in exposure with a factor 2 was associated with an extra decline of FEV1 of 19 ml/yr.

References

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