An 11-month-old girl is brought to the physician for a 1-day history of cough and fever. Her temperature is 102 F. Pulse oximetry shows oxygen saturation of 91%. Auscultation of the chest demonstrates wheezes and crackles bilaterally. Which of the following is the most likely explanation for these findings?
Bronchiolitis
Croup
Epiglottitis
Laryngeal papillomatosis
Tracheitis
