Which history best describes croup?

• A. Sudden high fever with sore throat
• B. Wheezing since infancy
• C. Productive cough with purulent sputum
• D. Recent cold that developed gradually into a barking cough over 2-3 days

Answer: (D)

Croup is a viral inflammatory process of the larynx and subglottic airway that typically follows an upper respiratory infection. The classic history is a recent cold that gradually progresses over a day or two to a harsh, barking cough, often with hoarseness and sometimes inspiratory stridor, which tends to be worse at night. That progression—a recent cold developing into a barking cough over 2–3 days—is the hallmark and best fit for croup.

The other histories don’t fit as well: a sudden high fever with sore throat suggests bacterial throat infections or epiglottitis; wheezing since infancy points toward bronchiolitis or asthma; a productive cough with purulent sputum leans toward bacterial bronchitis or pneumonia.