LYCOS RETRIEVER 
Bronchitis: Inflammation
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Viruses are the most common cause of bronchial inflammation in otherwise healthy adults with acute bronchitis. Only a small portion of acute bronchitis infections are caused by nonviral agents, with the most common organism being Mycoplasma pneumoniae.8-10 Study findings suggest that Chlamydia pneumoniae may be another nonviral cause of acute bronchitis.11,12
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Acute bronchitis , inflammation of the bronchial tree, is generally almost as self limiting, like a bad chest cold, with eventual subsiding to undetectable levels. I say "undetectable" because the shrinkage of the breathing system tends to invite further episodes.This shrinking, surfactant (mucous type lining of alveoli) compromise, and or reduction in expansion/contraction flexibility is hard to detect. One way to measure it is by regularly taking thebreathing tests plus the rib expansion test and a few others included in the manual. Or if you are a singer you may notice occasionally or frequently that you are having trouble reaching high notes or low tone sustains.
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Inflammation