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farmer's lung farm·er's lung (fär'mərz)
An occupational disease characterized by fever and dyspnea, caused by inhalation of organic dust from moldy hay containing spores of actinomycetes and certain fungi.
a pulmonary disorder that results from the development of hypersensitivity to inhaled dust from moldy hay or other fodder. In the acute form, symptoms include a sudden onset of breathlessness, fever, a rapid heartbeat, cough (especially in the morning), copious production of phlegm, and a general sense of feeling ill. Attacks may last a few days to several weeks. In its chronic form, farmer's lung may persist for years and lead to respiratory failure from chronic bronchitis or pulmonary fibrosis. Avoidance of offending dusts is the most effective treatment