A 5-month-old boy presents to the emergency department in winter with cough, wheezing, poor feeding, and increased work of breathing. He attends daycare. Vital signs show temperature 38.2°C, heart rate 148/min, respiratory rate 52/min, blood pressure 95/60 mmHg, and oxygen saturation 89% on room air. Examination reveals diffuse crackles and wheezes. Chest X-ray shows hyperinflation with peribronchial thickening. He denies fever for past 24 hours. Which pathogen is most likely responsible?
- A)Bordetella pertussis
- B)Adenovirus type 40
- C)Respiratory syncytial virusGABARITO
- D)Parainfluenza virus
- E)Influenza B virus
Explicação
Respiratory syncytial virus is correct. RSV is the leading cause of bronchiolitis in infants and typically presents in winter with cough, wheeze, crackles, tachypnea, and feeding difficulty. Severe disease is more likely in young infants and those with prematu... Ver explicação completa e trilha adaptativa →