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人嗜酸细胞（ＥＯＳ）在支气管哮喘和气道高反应性中起着主要作用，循环系统和支气管肺泡灌洗液（ＢＡＬＦ）ＥＯＳ增多是慢性支气管哮喘的特征。嗜酸细胞增多症也是寄生虫感染特有的特征，ＥＯＳ是蠕虫免疫性的效应细胞。最近研究提出了几种嗜酸细胞增多症的致病机理：其一，?
Human eosinophils (EOS) play a major role in bronchial asthma and airway hyperresponsiveness. Increased EOS in the circulatory system and bronchoalveolar lavage fluid (BALF) is characteristic of chronic bronchial asthma. Eosinophilia is also a peculiar feature of parasitic infections, EOS is a worm immune effector cells. Recent studies have proposed several pathogenic mechanisms of eosinophilia: one,