A 62-year-old man presents with a cough productive of yellowish sputum, and intermittent fever with chills for 3 days. There is no history of dyspnea, wheezing, hemoptysis, or chest pain. His medical history is significant for hypertension and type II diabetes mellitus for 5 years, both of which are well controlled. There is no family history of asthma, or a personal history of contact with tuberculosis. He drinks socially, but does not smoke or use recreational drugs.