الفهرس 
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Abstract
Introduction Asthma is a condition in which your airways narrow and swell and produce extra mucus. This can make breathing difficult and trigger coughing, wheezing and shortness of breath.
Aim The aim of this study is to assess the relationship between the level of peripheral blood eosinophilia and the severity of asthma.
Patients and methods This study included 30 asthmatic patients recruited from the Abbasid Hospital for the chest.
Results The results of the study showed that there were statistically significant differences in the level of eosinophils before and after the use of oral steroid and inhalation side by side, (P> 0.05). There was also a significant statistical difference with respect to E, TLC, and Hb levels before and after steroid therapy, P = 0.001, 0.007 and 0.008, respectively.
Conclusion The study proved that high number of eosinophils in the blood is a means of determining the extent of asthma, but the exact position and definition of clinically important eosinophils in this preparation should be determined. There may also be some possibilities for using eosinophils to identify patients who may benefit from targeted therapies.