Bronchitis occurs most often during the
cold and flu season, usually coupled
with an upper respiratory infection.
- Several viruses cause bronchitis, including influenza A and B, commonly referred to as "the
- A number of bacteria are also known to cause bronchitis, such as Mycoplasma
pneumoniae, which causes so-called "walking pneumonia."
- Bronchitis also can occur when a person inhales irritating fumes or dust.
Chemical solvents and smoke, including
tobacco smoke, have been linked to acute
- People at increased risk of both getting bronchitis and of having more
severe symptoms include the elderly, those with weakened immune systems,
smokers, individuals with chronic obstructive pulmonary disease (COPD) or
emphysema, and anyone with repeated exposure to lung irritants.
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