Final answer:
The child's presentation is indicative of croup, a viral infection causing inflammation of the upper airway. Treatment options include humidified air or nebulized epinephrine.
Step-by-step explanation:
The presentation of the child is indicative of croup. Croup is a viral infection that causes inflammation of the upper airway, resulting in a barking cough, retractions at rest, and good air entry during auscultation. A pulse oximetry reading of 93% on room air indicates mild hypoxemia. Treatment for croup typically involves humidified air or nebulized epinephrine.