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Bronchiolitis is an inflammation of the tiny airways called bronchioles. It is a respiratory infection that typically affects very young children and can lead to severe respiratory problems.
The most common cause of bronchiolitis is a virus by the name of respiratory syncytial virus (RSV). The virus infects the lungs and breathing passages. Most recover within one to two weeks. RSV can, however, cause severe respiratory problems in certain groups including newborns, young children and the elderly.
The RSV responsible for bronchiolitis is highly contagious and spreads swiftly through direct contact with the eyes, nose or mouth and via a person's hands after they have touched contaminated objects. The germs associated with this infection generally cause outbreaks that last from late fall to early spring.
Other viruses, such as the flu virus, can also cause bronchiolitis.
RSV bronchiolitis typically affects young children. In fact, by the time they have reached the age of two years, most children have already been exposed to RSV. Some children are more predisposed to developing bronchiolitis:
The elderly and adults with heart or lung problems or weakened immune systems are at risk of developing RSV-related diseases including bronchiolitis.
Smoking also increases the risk of developing bronchiolitis.
The symptoms of RSV are similar to those of the common cold. These include nasal congestion, runny rose, cough, sore throat, low-grade fever and otitis. These symptoms are not serious and should disappear within two weeks.
When a RSV infection worsens and develops into bronchiolitis, symptoms in children include:
If your child presents any of these symptoms, see your doctor.
Diagnosis is usually based on the observation of symptoms. In rare cases, the doctor may request a chest x-ray. Blood tests may be used to determine the level of oxygen in the bloodstream. A nasal mucus sample may be taken to establish whether the RSV is indeed responsible for the bronchiolitis.
Infected children should rest for the first 48 to 72 hours. Contact with others should be kept to a minimum to avoid further contamination.
To ease breathing, a bronchodilator (inhaled medication that opens the airway) may be prescribed. Clearing the nasal passages with a saline solution (Salinex®) or nasal aspirator can also provide some relief. Fever can be treated with acetaminophen. If there is a secondary bacterial infection such as otitis or pneumonia, an antibiotic may be prescribed. On occasion, respiratory physiotherapy treatments are also recommended.
In more severe cases, the child will be hospitalized and will receive supplementary oxygen.
Frequent hand washing is the best prevention against RSV. Hand hygiene is even more important in areas heavily frequented by young children such as daycare centres and preschools. Providing a healthy, smoke-free environment and breastfeeding infants will also help prevent RSV.
For more information:
Canadian Lung Association
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