[Lung diseases in farmers].

Respiratory diseases in farmers are complex and intricate diseases. Their diagnosis, management and treatment are difficult and their social and financial consequences can be painful. Respiratory diseases include: hypersensitivity pneumopathies, the most frequent and recognized one being farmer's lung disease; agricultural chronic bronchitis; allergic or non-allergic asthmas and rhinitis; and toxic bronchopneumopathies, of which organic dust toxic syndrome (or dust fever) is the most common, especially in animal breeding environments. The purpose of this article is to shortly describe these diseases, indicate their frequency and the main elements of their management: treatments and prevention methods.