Snapshot A 77-year-old man is brought in by EMS after waking up in the middle of the night covered in sweat, with a high fever, and a coughing up yellow sputum. A chest xray is shown. Introduction Definition login to view 2 more bullets Pathophysiology login to view 1 more bullet Risk factors login to view 3 more bullets Classification Classic patterns include login to view 12 more bullets Presentation Symptoms login to view 13 more bullets Physical exam login to view 11 more bullets Evaluation CXR login to view 2 more bullets CBC login to view 1 more bullet Sputum Gram stain and cultures login to view 2 more bullets Treatment Pharmacologic login to view 2 more bullets