Respiratory disorders in agriculture from an epidemiologic perspective.

Epidemiologic studies show a relative excess of respiratory symptoms in persons dwelling in farming communities. An association of respiratory health with work conditions in agriculture has been suggested by investigations into chronic bronchitis, bronchial asthma, extrinsic allergic alveolitis, organic dust toxic syndrome and airflow limitation. However, the occurrence and determinants of these diseases have been recognized for selected exposure categories. The evident lack of adequate information for a majority of agricultural respiratory hazards and respiratory responses invites further epidemiologic, experimental and clinical research into this major industry.