Facts about croup:
- Children with croup release the virus into the air on droplets of mucus when they sneeze or cough.
- The virus enters the lungs of others when they inhale the droplets.
- It usually takes about 3 to 5 days for symptoms of croup to develop.
Continue to Laryngotracheobronchitis Anatomy
- Bjornson CL, Klassen TP, Williamson J, Brant R, Mitton C, Plint A, Bulloch B, Evered L, Johnson DW; Pediatric Emergency Research Canada Network. A randomized trial of a single dose of oral dexamethasone for mild croup. N Engl J Med. 2004 Sep 23;351(13):1306-13. 
- Custer JR. A randomized trial of a single dose of oral dexamethasone for mild croup. J Pediatr. 2005 Mar;146(3):434-5. 
- Griffin S, Ellis S, Fitzgerald-Barron A, Rose J, Egger M. Nebulised steroid in the treatment of croup: a systematic review of randomised controlled trials. Br J Gen Pract. 2000 Feb;50(451):135-41. 
- Johnson D. Croup. Clin Evid. 2004 Dec;(12):401-26.