A 55-year-old man with poorly controlled diabetes and chronic alcoholism presents with fever (39.2°C), productive cough with foul-smelling purulent sputum, and dyspnea. Vital signs show BP 128/76 mmHg, HR 102/min, RR 22/min, SpO2 92% on room air. Chest X-ray demonstrates a right lower lobe infiltrate with an air-fluid level. Laboratory studies reveal WBC 14,200/μL. He denies recent aspiration events. Which organism is most likely responsible?
- A)Streptococcus pneumoniae
- B)Peptostreptococcus and Prevotella speciesGABARITO
- C)Mycobacterium tuberculosis
- D)Haemophilus influenzae
- E)Legionella pneumophila
Explicação
Lung abscess with foul-smelling sputum in a patient with aspiration risk factors (alcoholism, poor dentition) indicates anaerobic infection. Peptostreptococcus, Prevotella, and other anaerobes are classic causative organisms forming necrotizing infections. Ver explicação completa e trilha adaptativa →