A 4-year-old boy with acute onset of fever, cough, and inspiratory stridor is brought to the emergency department. He has not been vaccinated. Laryngoscopy reveals subglottic narrowing with a characteristic 'pencil point' sign on neck X-ray. Lateral neck radiograph shows subglottic edema. Which of the following viruses is most likely responsible for this presentation?
- A)Parainfluenza virus type 1GABARITO
- B)Influenza A virus
- C)Epstein-Barr virus
- D)Respiratory syncytial virus
- E)Human metapneumovirus
Explicação
Parainfluenza virus type 1 is the most common cause of viral croup, presenting with subglottic laryngitis characterized by inspiratory stridor, hoarseness, and a characteristic 'pencil point' (narrowed subglottis) on anteroposterior neck X-ray. The disease aff... Ver explicação completa e trilha adaptativa →