farmer's lung

noun
a lung disorder caused by inhalation of moldy hay dust, marked by shortness of breath, dry cough, and weight loss.

Origin:
1940–45

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Collins
World English Dictionary
farmer's lung
 
n
inflammation of the alveoli of the lungs caused by an allergic response to fungal spores in hay

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Medical Dictionary

farmer's lung farm·er's lung (fär'mərz)
n.
An occupational disease characterized by fever and dyspnea, caused by inhalation of organic dust from moldy hay containing spores of actinomycetes and certain fungi.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Britannica
Encyclopedia

farmer's lung

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

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Farmer's lung is caused by exposure to dust from moldy hay, straw, and grain.
Precipitin test negative farmer's lung--activation of the alternative pathway of complement by moldy hay dusts.
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