Asthma
Chapter: 12
Is a chronic obstructive disease characterized by tracheo- bronchial hyper-reactivity leading to paroxysmal airway narrowing, which may reverse spontaneously or as a result of treatment. It is characterized clinically by wheezing, dyspnea, and cough. Allergic asthma is the most common form. Other precipitating factors include infection, exercise, occupational and environmental exposures, drugs, air pollution, and emotional factors.