A 72-year-old man with COPD presents with acute dyspnea and productive cough with rusty sputum. Vital signs show temperature 39.2°C, heart rate 108/min, blood pressure 142/88 mmHg, respiratory rate 24/min, and SpO2 88% on room air. Chest X-ray demonstrates lobar consolidation in the right lower lobe. Laboratory studies reveal WBC 14,200/μL; blood cultures pending. He denies recent antibiotic use. Which organism is most likely responsible for this pneumonia?
- A)Mycoplasma pneumoniae
- B)Haemophilus influenzae
- C)Legionella pneumophila
- D)Pseudomonas aeruginosa
- E)Streptococcus pneumoniaeGABARITO
Explicação
Classic lobar pneumonia with rusty sputum in an elderly patient with COPD is highly suggestive of Streptococcus pneumoniae, the most common cause of community-acquired pneumonia (CAP) in adults. Ver explicação completa e trilha adaptativa →