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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]
Approximately 15–50% of children will go on to develop more serious lower respiratory tracts infections, such as bronchiolitis, viral pneumonia, or croup. [19] [21] Infants are at the highest risk of disease progression. [3] Video: Respiratory Syncytial Virus and Bronchiolitis
[16] Diphtheritic croup is extremely rare in countries where diphtheria vaccination is customary. As a result, the term "croup" nowadays most often refers to an unrelated viral illness that produces similar but milder respiratory symptoms. [17]
In adults, a fever is generally not present but it is common in infants and young children. [4] The cough is usually mild compared to that accompanying influenza . [ 4 ] While a cough and a fever indicate a higher likelihood of influenza in adults, a great deal of similarity exists between these two conditions. [ 24 ]
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.
Johanna Contreras, M.D., a cardiologist at Mount Sinai Fuster Heart Hospital in New York City, said she has seen people mistaking virus symptoms for serious heart complications.. Some patients who ...
Infants and young children are also very susceptible; globally, pneumonia kills more children under the age of 5 than any other infectious disease. Other vulnerable groups include people who are ...
The study, which was published in February in the journal Nature Microbiology, found that influenza A viral particles can actually adapt their shape to remain infectious and stick around longer ...