Bronchitis is an inflammation of the mucous membranes of the bronchi.
Bronchitis can be divided into two categories: acute and chronic.
Acute bronchitis is characterized by the development of a cough or small sensation in the back of the throat, with or without the production of sputum .
Acute bronchitis often occurs during the course of an acute viral illness such as the common cold or influenza. Viruses cause about 90% of acute bronchitis cases, whereas bacteria account for about 10%.
