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Extrinsic allergic alveolitis; Farmer's lung; Mushroom picker's disease; Humidifier or air-conditioner lung; Bird breeder's or bird fancier's lung
Symptoms of acute hypersensitivity pneumonitis may occur 4 - 6 hours after you have left the area where the foreign substance is found, making it difficult to find a connection between your activity and the disease.
Symptoms may include:
Symptoms of chronic hypersensitivity pneumonitis may include:
Your doctor may hear abnormal lung sounds called crackles (rales) when listening to your chest with a stethoscope.
Lung changes due to chronic hypersensitivity pneumonitis may be seen on a chest x-ray. Other tests may include:
Rose CS, Lara AR. Hypersensitivity pneumonia. In: Mason RJ, Broaddus VC, Martin TR, et al, eds. Murray and Nadel's Textbook of Respiratory Medicine. 5th ed. Philadelphia, Pa: Saunders Elsevier; 2010:chap 66.
Samet JM. Occupational pulmonary disorders. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 93.
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