A 64-year-old man with COPD presents with fever (39.2°C), cough, confusion, and diarrhea after returning from a hotel conference. Vital signs show HR 104/min, BP 118/72 mmHg, RR 22/min, SpO2 94% on room air. Chest X-ray reveals patchy left lower lobe infiltrates. Serum sodium is 128 mEq/L. He denies hemoptysis. He takes albuterol and tiotropium daily. Which organism is most likely responsible for this clinical presentation?
- A)Haemophilus ducreyi
- B)Chlamydia psittaci
- C)Mycoplasma pneumoniae
- D)Legionella pneumophilaGABARITO
- E)Streptococcus pyogenes
Explicação
Legionella pneumophila is correct. Legionella causes atypical pneumonia with gastrointestinal symptoms, confusion, hyponatremia, and exposure to contaminated water sources such as hotel air conditioning systems. It is diagnosed by urinary antigen testing or cu... Ver explicação completa e trilha adaptativa →