Croup or laryngotracheobronchitis is a respiratory disease that tends to affect children between 3 months and 5 years of age. It is usually triggered by a viral infection of the upper respiratory tract that inflames the throat tissue and makes it difficult for the infant to breathe normally.
According to the journal Anales de Pediatría, croup represents up to 20% of respiratory diseases in childhood. It can produce mild, moderate or severe symptoms, which are worse at night. If you want to know everything about the disorder and how to deal with it, read on.
Types of croup
As we have said, croup is usually caused by a viral infection. Pathogens enter through the nasal passages and spread to the epithelium of the nasopharynx and trachea, where they can stop or continue down the respiratory tree.
This generates inflammation that makes speech and breathing difficult, presenting with variable symptoms. There are two main types of croup and we will tell you about their peculiarities below.
1. Acute laryngotracheitis
The causative germs of this variant are usually type 1, 2 and 3 parainfluenzaviruses, representing more than 75% of infections in infants. Bacterial pathogens are rare, but the Mycoplasma pneumoniae species is responsible for up to 3%.
This variant begins as an upper respiratory disease that ends in croup in 1-3 days. It is much more common in children than in adults, since their immune system is less refined and the respiratory tree is thinner in diameter, which facilitates partial obstruction.
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