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Bronchiolitis

Bronchiolitis is an inflammation of the small air passages (bronchioles), usually caused by a virus (respiratory syncytial virus, or RSV, is one such virus).

Bronchiolitis usually affects children under the age of 2 years. It is the leading cause of serious lower respiratory illness in infants.

Symptoms of bronchiolitis include labored, rapid breathing with wheezing and a cough that sounds "tight." If the infection becomes severe, the infant's breathing rate may increase noticeably.

If severe difficulty breathing occurs, immediate medical attention is needed.

ByHealthwise Staff
Primary Medical ReviewerSusan C. Kim, MD - Pediatrics
Specialist Medical ReviewerJohn Pope, MD - Pediatrics
Last RevisedJune 25, 2012

WebMD Medical Reference from Healthwise

Last Updated: June 25, 2012
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