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  • Title: [Clinical feature and airway inflammation in eosinophilic bronchitis].
    Author: Ma HM, Zhu LX, Lai KF, Zhu T, Sun BQ, Zhong NS.
    Journal: Zhonghua Jie He He Hu Xi Za Zhi; 2003 Jun; 26(6):362-5. PubMed ID: 12899771.
    Abstract:
    OBJECTIVE: To study the clinical features and airway inflammation in eosinophilic bronchitis (EB) and the treatment outcomes. METHODS: Irwin's anatomic protocol for diagnosing chronic cough was used in 86 patients with chronic cough, and induced sputum by hypertonic saline aerosol inhalation was performed. Differential cell counts were performed in induced sputum, and eosinophilic cationic protein (ECP) was measured with fluoroimmunoassay, while interleukin-8 (IL-8) was measured with enzyme-linked absorbed immunoassay. EB was diagnosed according to Gibson's criteria and treated with inhaled budesonide 200 - 400 micro g twice daily for four weeks, and in some patients oral prednisone 10 - 15 mg/d or methyl-prednisone 8 - 12 mg/d was given for one week. RESULTS: 13 (15%) out of 86 patients with chronic cough were diagnosed as having EB. Dry cough was the major compliant and all had normal lung function with negative histamine provocation test. The Eos count was 0.1862 +/- 0.1632 and the concentration of ECP (2.53 +/- 2.07) mg/L in induced sputum were significant higher in patients with EB as compared with those normal subjects (P < 0.01). The cough disappeared in all patients at the end of one week of inhaled or orally administered corticosteroids. CONCLUSION: EB, an eosinophilic airway inflammation, is one of important causes of chronic cough and responds well to corticosteroid therapy.
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