A known alcoholic appears at the emergency department with chest pain, a 40°C/104°F fever, chills, and a productive cough. He has no history of chronic pulmonary disease. There are red blood cells an encapsulated Gramnegative rods in the sputum. The symptoms are most likely caused by

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Klebsiella pneumoniae is associated with pneumonia in alcoholics. The other Gram-negative rod (Pseudomonas aeruginosa) is associated with chronic pulmonary disease in the immunocompromised.

A Known Alcoholic Appears at the Emergency Department with Chest