Inflammation involving the glottis or vocal cords and the subglottic larynx. croup is characterized by a barking cough, hoarseness, and persistent inspiratory stridor (a high-pitched breathing sound). it occurs chiefly in infants and children.

Croup ( KROOP), also known as croupy cough, is a type of respiratory infection that is usually caused by a virus. The infection leads to swelling inside the trachea, which interferes with normal breathing and produces the classic symptoms of "barking/brassy" cough, inspiratory stridor and a hoarse voice...