Causes of Bronchitis
• Bronchitis occurs mostly during the flu and cold season, and is normally associated with upper respiratory tract infection.
• Viruses such as Influenza A and Influenza B can cause bronchitis to develop.
• Bacteria such as mycoplasma pneumoniae also cause bronchitis
• A person inhaling irritating fumes, chemical solvents, dust or cigarette smoke may develop bronchitis.