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Croup (/ k r uː p / KROOP), also known as croupy cough, is a type of respiratory infection that is usually caused by a virus. [2] 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. [2]
It is occasionally confused with croup. If it is inflamed, a condition known as tracheitis can occur. In this condition there can be inflammation of the linings of the trachea. A condition called tracheo-bronchitis can be caused, when the mucous membrane of the trachea and bronchi swell.
HPIV-1 and HPIV-2 have been demonstrated to be the principal causative agent behind croup (laryngotracheobronchitis), which is a viral disease of the upper airway and is mainly problematic in children aged 6–48 months of age.
Croup (Laryngotracheobronchitis) is a viral infection of the vocal cords typically lasting five to six days. The main symptom is a barking cough and low-grade fever. On an X-ray, croup can be recognized by the "steeple sign", which is a narrowing of the trachea. It most commonly occurs in winter months in children between the ages of 3 months ...
The trachea can be affected by inflammation or infection, usually as a result of a viral illness affecting other parts of the respiratory tract, such as the larynx and bronchi, called croup, that can result in a cough. Infection with bacteria usually affects the trachea only and can cause narrowing or even obstruction.
[1] [2] The presence of the steeple sign supports a diagnosis of croup, usually caused by paramyxoviruses. [3] It can also be defined as the replacement of the usual squared-shoulder appearance of the subglottic area by cone-shaped narrowing just distal to the vocal cords. This is called the steeple or pencil-point sign.
The primary symptom is a cough with sputum that may be purulent.The illness may also cause shortness of breath or wheezing. Upper respiratory tract infections (URTIs) often precede acute bronchitis, with overlapping symptoms including headache, nasal congestion, and sore throat.
In children, viral infections such as croup or epiglottitis are frequent causes. [4] Adults are more likely to experience obstruction from enlargement of the tonsils or vocal cord paralysis. [3] Obstructive sleep apnea is the most common chronic cause of upper airway obstruction. [2]