| [chronic obstructive bronchitis in a fodder farming setting]. | respiratory disease in agricultural workers are dominated both in terms of frequency and severity by chronic obstructive long disease. in the doubs, in dairy cereal farmers, the prevalence of chronic bronchitis in active farm workers is around 10 per cent, and 6 per cent are non-smokers. it is twice the level of the control population of non-exposed subjects. the frequency is most elevated in the men and increases both with age and with altitude. a longitudinal study of male farm workers aged mo ... | 1996 | 9036502 |