Bronchitis is usually caused by infection from a virus (less commonly with bacteria or a fungus). It can also develop after exposure to chemicals or air pollution, including tobacco smoke.
There are two types of bronchitis.
|Primary Medical Reviewer||E. Gregory Thompson, MD - Internal Medicine|
|Specialist Medical Reviewer||Robert L. Cowie, MB, FCP(SA), MD, MSc, MFOM - Pulmonology|
|Last Revised||July 10, 2012|
WebMD Medical Reference from Healthwise