what is the croup
croup or laryngotracheobronchitis is a respiratory condition that is usually triggered by an acute viral infection of the upper airway the infection leads to swelling inside the throat which interferes with normal breathing and produces the classical symptoms of a barking cough stridor and hoarsenessroup or laryngotracheobronchitis is a respiratory condition that is usually triggered by an acute viral infection of the upper airway the infection leads to swelling inside the throat which interferes with normal breathing and produces the classical symptoms of a barking cough stridor and hoarseness