A 63-year-old man presents with a 3-day history of high fever, confusion, watery diarrhea, and nonproductive cough following attendance at a hotel conference. Vital signs show temperature 39.2°C, BP 128/76 mmHg, HR 102/min, RR 22/min, and SpO2 94% on room air. Laboratory studies reveal hyponatremia (126 mEq/L) and elevated LDH. Chest X-ray shows patchy left lower lobe consolidation. He denies taking antibiotics prior to presentation. Which organism is most likely responsible?
- A)Mycoplasma pneumoniae
- B)Klebsiella pneumoniae
- C)Streptococcus pneumoniae
- D)Chlamydophila psittaci
- E)Legionella pneumophilaGABARITO
Explicação
Legionella pneumophila is correct. The combination of pneumonia, diarrhea, confusion, and hyponatremia after hotel water exposure is classic for Legionella. This organism is a high yield cause of atypical pneumonia in older or immunocompromised adults. Ver explicação completa e trilha adaptativa →