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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 affects infants. It is the leading cause of serious lower respiratory illness.
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.
Current as of:
August 21, 2015
Susan C. Kim, MD - Pediatrics & John Pope, MD - Pediatrics
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