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Hypersensitivity pneumonitis

Alternative Names: Extrinsic allergic alveolitis; Farmer's lung; Mushroom picker's disease; Humidifier or air-conditioner lung; Bird breeder's lung Symptoms: Acute hypersensitivity pneumonitis may have the following symptoms: Cough Fever Chills Shortness of breath Malaise (feeling ill) Text Continues Below Chronic hypersensitivity pneumonitis may have the following symptoms: Breathlessness, especially with exertion Cough, often dry Loss of appetite Unintentional weight loss Signs and tests: Crackles (rales) may be heard when a stethoscope is used to examine the chest. Tests may include the following: Chest x-ray Pulmonary function tests CBC Hypersensitivity pneumonitis antibody panels Aspergillus precipitins test High-resolution CT scan of the chest Bronchoscopy with washings and biopsy Video-assisted or open-lung biopsy

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