Which feature distinguishes bacterial tracheitis from viral croup?

• A. High fever and toxic appearance with persistent stridor
• B. Low fever and mild cough
• C. Lack of inspiratory stridor
• D. Normal chest x-ray

Answer: (A)

Distinguishing features between bacterial tracheitis and viral croup hinge on systemic illness and how airway symptoms behave. Bacterial tracheitis usually presents with a high fever and a child who looks ill or toxic, with stridor that persists despite initial treatment and supportive care—reflecting a true bacterial infection with thick purulent tracheal secretions that can keep narrowing the airway. Viral croup tends to have a milder fever, a barking cough, hoarseness, and inspiratory stridor that tends to improve with standard therapy such as steroids and humidified air. So the combination of high fever, toxic appearance, and persistent stridor is the best clue that points to bacterial tracheitis. Imaging can help but isn’t definitive on its own; croup often shows subglottic narrowing on x-ray, whereas tracheitis can have irregular tracheal contours or purulent material, but treatment decisions rely most on clinical severity rather than imaging alone.