Abstract
Objective To explore the features of airway inflammation in patients with eosinophilic bronchitis(EB). Methods Sputum induced eosinophilic count was performed in 7 patients with EB(EB group), 12 patients with asthma(asthma group), 16 patients with cough variant asthma(CVA group), and 6 patients with atrophic rhinitis(AR group). The number of eosinophil and mastocyte was detected by bronchial biopsy in patients of EB and CVA group. Results The percentage of eosinophil counts of induced sputum in asthma group, CVA group, EB group and AR group was ( 18.7±5.3)%, ( 10.2± 4.5)% ,(8.7±2.3)% and (2.7±3.2 )% respectively. There were significant differences between EB group and the other three groups.The number of eosinophil in airway smooth muscle was significantly lower in EB group [ ( 1.3±0.1 )/mm2 ]than that in CVA group[ (5.2±1.2)/mm2]. And the mastocyte number in EB group[ (3.5±1.4)/mm2] was significantly lower than that in CVA group [ ( 12.5±2.4)/mm2]. Conclusions Perhaps EB is associated with many diseases. Aggressive treatment maybe prevent asthma. Eosinophil and mastocyte number is significantly low in patients with EB compared those with CVA, which maybe play an important role in absent airway hyper-responsiveness in EB. Key words: Eosinophils; Bronchitis
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