Respiratory effects of bioaerosols: exposure-response study among salmon-processing workers.

Objectives: The aim of the study was to determine exposure-response relationships in salmon-processing workers.

Methods: Cross-shift FEV1, acute respiratory symptoms, and exposure to total protein, parvalbumin and endotoxin were main variables measured during one workweek. Exposure-response relationships were analyzed by Generalized Estimation Equations of cross-week data and by multiple regressions of day-to-day data.