This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infectious Lung Disease: Pneumonia, Subject name: Pathology
[{'content': 'A 10-year-old boy suffers head trauma and lies unconscious for 2 weeks. He is now intubated. His temperature rises to 38.7degC (103degF) and oxygenation becomes more difficult. A chest X-ray reveals a pleural effusion and multiple abscesses in the lung parenchyma. Which of the following microorganisms is the most likely cause of this pulmonary infection? \nSelect and explain. \nA. Legionella pneumophila, B. Mycoplasma pneumoniae, C. Pneumocystis carinii, D. Staphylococcus aureus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Staphylococcal pneumonia is an uncommon community-acquired disease. However, pulmonary infection with Staphylococcus aureus is common as a superinfection after influenza and other viral respiratory tract infections. Nosocomial (hospital acquired) staphylococcal pneumonia typically occurs in chronically ill patients who are prone to aspiration or who are intubated. High incidence of complications, such as lung abscess and empyema. L. pneumophila, seen paicularly in individuals with co-morbid conditions (e.g., hea or lung disease) and in organ transplant recipients.', 'role': 'assistant'}]