外源性变应性肺泡炎系反复吸入具有抗原性的有机粉尘后所引起的肺泡壁过敏性炎症,并伴有肺间质纤维组织增生。它是农民肺、霉蔗肺、蘑菇肺、饲鸽肺等一组过敏性肺疾病的总称。一、病因能够引起本病的有机粉尘很多,常见的有以下5类。①动物蛋白尘埃,如鸟类、家禽类粪便中蛋白质,污染羽毛的唾液成分。②污染有放线菌的 Exogenous allergic alveolitis is repeated inhalation of antigenic organic dust caused by alveolar wall allergic inflammation, accompanied by interstitial lung fibrosis. It is a general term for a group of allergic pulmonary diseases such as farmer’s lung, mold sugarcane lung, mushroom lung, and pigeon lung. First, the cause of the disease can cause a lot of organic dust, the common have the following 5 categories. ① animal protein dust, such as birds, poultry, protein in feces, feather saliva contamination of ingredients. ② pollution actinomycetes