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在慢性支气管炎和慢性缺氧性肺源性心脏病的发病原因中,变应性呼吸道疾病日益受到重视,尤其是过敏性肺炎(Hypersensitivity pneumonitis或称外源性变应性肺泡炎Extrinsic allergic alveolitis)。对这一组由不同致敏原引起的临床综合征的正确认识,将直接关系到上述二类疾病的防治工作。病因各种有机物尘埃的吸入,都有可能成为过敏性肺炎的致敏因子。尘埃颗粒须小于3～5μm,才能达到呼吸道末端,激起过敏。引起本组疾病的有机物尘埃大致分5类:①动物蛋白质尘埃:如在鸟类爱好者,养鸽者、养鸭者及火鸡经营者等均可发病。致敏因子是干燥
In the pathogenesis of chronic bronchitis and chronic hypoxic pulmonary heart disease, allergic respiratory diseases are receiving more and more attention, especially the hypersensitivity pneumonitis (Hypersensitivity pneumonitis or extrinsic allergic alveolitis) . Correct understanding of this group of clinical syndromes caused by different allergens will be directly related to the prevention and control of the above two types of diseases. Etiology A variety of organic dust inhalation, are likely to become allergic pneumonia sensitizing factor. Dust particles must be less than 3 ~ 5μm, in order to reach the end of the respiratory tract, provoke allergies. Organisms causing dust disease in this group can be divided into five categories: ① animal protein dust: such as bird lovers, pigeon breeders, ducks and turkeys operators can attack. The sensitizer is dry