Bronchiolitis is an infection of the lower respiratory tract that usually affects infants and children younger than two. Bronchiolitis develops when a virus moves from the nose and throat into the lungs, leading to swelling in the smaller airways or bronchioles of the lung. This causes obstruction of air in the smaller airways.

Bronchiolitis is a disorder most commonly caused in infants by viral lower respiratory tract infection. It is the most common lower respiratory infection in this age group. It is characterized by acute inflammation, edema, and necrosis of epithelial cells lining small airways, increased mucus production, and bronchospasm.The American Academy of Pediatrics convened a committee composed of.

Bronchiolitis is an infection of the lower respiratory tract that usually affects infants and children younger than two. Bronchiolitis develops when a virus moves from the nose and throat into the lungs, leading to swelling in the smaller airways or bronchioles of the lung.

DESCRIPTION. Obliterative Bronchiolitis (OB) is a rare, irreversible, life-threatening form of lung disease that occurs when the small airway branches of the lungs (bronchioles) are compressed and narrowed by scar tissue (fibrosis) and inflammation. Extensive scarring results in decreased lung function.