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Broncheal diseases

Bronchiectasis is a disorder of the airways within the lungs. Inflammation and infections cause damage to the airways with alteration in the lining layer of the airways. The airways become distorted and enlarged. Enlargement can be uniform or irregular. Mucus can collect in the airways and is difficult to clear because of the damage to the normal ways the airways clear mucus. This can lead to episodes of infection. Bronchiectasis may be focal and limited to a single segment or lobe of the lung, or it may be widespread and affect multiple lobes in one or both lungs.
Bronchiolitis is an infection of the lower respiratory tract that usually affects infants. There is swelling in the smaller airways or bronchioles of the lung, which causes obstruction of air in the smaller airways. Bronchiolitis is almost always caused by a virus, most commonly the respiratory syncytial virus (RSV). Other viruses that can cause this condition are parainfluenza, influenza, measles, and adenovirus. The infection causes inflammation and swelling of the bronchioles, which in turn, blocks the airflow through the lungs.
Bronchitis is an inflammation of the bronchial tubes, or bronchi, that bring air into the lungs. Inflammation is a chemical reaction in the body that produces redness, swelling, and pain. The inflammation may be caused by a virus, bacteria, smoking or the inhalation of chemical pollutants or dust. In bronchitis, areas of the bronchial wall become inflamed and swollen, and mucus increases. As a result, the air passageway is narrowed. Bacteria and viruses are usually present. Most cases of acute bronchitis disappear within a few days without lasting effects, although coughs may linger three weeks or more.

Topics in respiratory and lung diseases

Lung diseases
Occupational lung diseases
Respiratory infections
Respiration disorders
Broncheal diseases
Pleural diseases
Lung transplant

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All information is intended for reference only. Please consult your physician for accurate medical advices and treatment. Copyright 2005,, all rights reserved. Last update: July 18, 2005