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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]
The viruses have a tendency towards different complications: influenza is more likely to cause severe pneumonia in high-risk groups; parainfluenza is more likely to cause croup in children. Influenza has effective vaccines available and can be treated with antiviral medications like neuraminidase inhibitors.
The swollen throat is often accompanied by a serious respiratory condition, characterized by a brassy or "barking" cough, stridor, hoarseness, and difficulty breathing; and historically referred to variously as "diphtheritic croup," [13] "true croup," [14] [15] or sometimes simply as "croup."
The common illness, which typically results in mild, cold-like symptoms but can be severe in infants and elderly adults, usually goes along with the winter flu season. Around 2,000 confirmed cases ...
One of the most common causes is Staphylococcus aureus and often follows a recent viral upper respiratory infection. Bacterial tracheitis is a rare complication of influenza infection. [ 4 ] It is the most serious in young children, possibly because of the relatively small size of the trachea that gets easily blocked by swelling.
While RSV very rarely causes severe disease in healthy adults, it can cause morbidity and mortality in the elderly and in those with underlying immune compromise or cardiopulmonary disease. Older adults have a similar presentation to younger adults but tend to have greater symptom severity with an increased risk of lower respiratory tract ...
Viruses that cause croup are generally the parainfluenza viruses 1–3, with influenza viruses A and B also causing croup, but usually causing more serious infections; bacteria may also cause croup and include Staphylococcus aureus, Haemophilus influenzae, Streptococcus pneumoniae and Moraxella catarrhalis. [10]
Lower respiratory infectious disease is the fifth-leading cause of death and the combined leading infectious cause of death, being responsible for 2.74 million deaths worldwide. [27] This is generally similar to estimates in the 2010 Global Burden of Disease study. [28]