Bronchitis

It is an inflammation of the lower airways. Occurs when the trachea and bronchi, located between the lungs become inflamed because of an infection or some other cause. In bronchitis, the epithelia lining the major airways, trachea and bronchi, are inflamed [4] and produces an excessive amount of mucus. The person affected by an important bronchitis cough, to expel the mucus, since the amount and efficiency of ciliated cells of respiratory epithelium is eroded. This increases the likelihood that a patient contracts an infectious disease of the air route, which may sometimes lead to pneumonia. Chronic inflammation can produce fibrosis in the lower airways.
(BRONQUITIS)