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Definition of Chronic bronchitis

Chronic bronchitis: Inflammation and swelling of the lining of the airways, leading to narrowing and obstruction generally resulting in daily cough. The inflammation stimulates production of mucus, which can cause further blockage of the airways. Obstruction of the airways, especially with mucus, increases the likelihood of bacterial lung infection. Chronic bronchitis is common in persons who have smoked for extended periods.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=7792
Last Editorial Review: 3/30/2012

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