What is the difference between acute and chronic bronchitis?

What is the difference between acute and chronic bronchitis?

Richard Sheldon (Medical Advisor to the CA State Respiratory Care Board) gives expert video advice on: How is bronchitis usually treated?; Should I take antibiotics for bronchitis?; What is the difference between bronchitis and pneumonia? and more...

Chronic bronchitis is where the bronchi become inflamed over a long period of time. Some books will say two consecutive months out of two consecutive years. Probably, three consecutive months out of two consecutive years is the best definition of chronic bronchitis but that has to be a chronic cough that's productive, productive of phlegm or mucous which appear to be, for the most part infected. In other words very pussy or nasty-looking stuff. Acute bronchitis is where it comes on suddenly. Usually it will go away within a week or so and there are no residuals left over as a result of having that inflammation. Chronic bronchitis, it goes on and on and on.