Acute Bronchitis is acute infection or inflammation of the airways or bronchi and is usually self-limiting. The vast majority of cases are caused by viruses, though bacterial bronchitis may occur in individuals with COPD. Clinical manifestations include fever, cough, chills, and malaise, and no infiltrates shown on radiograph. A hallmark sign of this infection is a nonproductive, dry cough that occurs in paroxysms and is aggravated by cold, dry, dusty air. Chest pain may develop from the effort of coughing. Purulent sputum may be present. Viral bronchitis is treated with rest, aspirin, humidity, and a cough suppressant.