The infection starts with a cold, cough, and low-grade temperature. Symptoms gradually develop over 2 days. The typical barking cough is usually present by day 3 and is more likely to be worse at night. The presence of stridor (wheezing on inspiration), hoarseness, difficulty swallowing, and respiratory distress is common but may or may not be severe.
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Croup, also termed laryngotracheitis or laryngotracheobronchitis, is a viral respiratory tract infection.
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