What is Bronchitis? Bronchitis is an inflammation of the bronchioles, the small tubes that connect the windpipe to the airways in the lungs. Learn more about the symptoms and what causes bronchitis. Diagnosis of Bronchitis To diagnose your disease, your physician will examine your general health status and may perform specialized tests to evaluate your lungs. Bronchitis Treatment Treatment of bronchitis is aimed at relieving symptoms and, if possible, eliminating the cause of the inflammation. Avelox Avelox is an advanced fluoroquinolone antibiotic. It has excellent activity against the bacteria that commonly cause bacterial flare-ups of chronic bronchitis.