Laryngotracheitis, laryngotracheobronchitis, and laryngotracheobronchopneumonitis are all included in the spectrum of croup. Croup is a common respiratory illness of the trachea, larynx, and bronchi that can lead to inspiratory stridor and barking cough. The parainfluenza virus typically causes croup, but a bacterial infection can also cause it. Croup is primarily a clinical diagnosis. Potentially life-threatening conditions such as epiglottitis or a foreign body in the airway must be ruled out first. Corticosteroids should be administered to all patients with croup, and epinephrine is reserved in those with moderate to severe croup.
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