Bird Fancier's Lung

**Semantic type:** Disease or Syndrome

**Definition:** Hypersensitivity granulomatous pneumonitis caused by the inhalation of avian antigens that are present in the dust of the droppings and feathers of many species of birds. In the acute phase it manifests as fever, chills, dyspnea, cough, and chest tightness. Chronic exposure may lead to interstitial lung fibrosis.

**Synonyms:** - Avian Hypersensitivity Pneumonitis - Bird fancier's lung - Bird-Breeder's Lung - Pigeon-Breeder's Lung