التعريف

Asthma is a chronic inflammatory airway disease characterised by intermittent airway obstruction and hyper-sensitivity. Many cellular components are involved in the asthmatic pathway, including mast cells, eosinophils, T lymphocytes, macrophages, neutrophils, and epithelial cells. On insult, in susceptible people, inflammation causes increased bronchial hyper-responsiveness and recurrent episodes of wheezing, breathlessness, chest tightness, and coughing, which are usually associated with widespread but variable airway obstruction that is reversible either spontaneously or with treatment. [1]