Acute bronchitis isinflammation of the main airways to the lungs called the bronchi. It is usually caused by an infection. Symptomsof acute bronchitis may last several weeks.
See also chronic bronchitis .
Bronchitis - acute
Causes, incidence, and risk factors
Acute bronchitis is one of the most common medical conditions seen in a doctor's office. Itisprimarily caused by avirus that infects the respiratory system.There are anumber of different respiratory viruses that can do this, including the rhinovirus, which causes the common cold.
The classic symptoms of bronchitis may mimic a cold. A tickle in the back of the throat progresses into a dry, irritating cough. But as the infection gets worse, a person may cough up thick, yellow mucus thatmay (rarely)be streaked with blood.
Sometimes the symptoms of bronchitisdo not appear until the underlying viral infection has gone away, and a secondary bacteria infection causes ...
Definition Bronchiolitis is swelling and mucus buildup in the smallest air passages in the lungs (bronchioles), usually due to a viral infection. Causes, incidence, and risk factors Bronchiolitis usually affects children under the age of 2, with a peak age of 3 - 6 months. It is a common, and sometimes severe illness. Respiratory syncytial virus (RSV) is the most common cause. Other viruses that can cause bronchiolitis include: Adenovirus Influenza Parainfluenza The virus is transmitted from person to person by direct contact with nasal fluids, or by airborne droplets. Although RSV generally causes only mild symptoms in an adult, it can cause severe illness in an infant. Bronchiolitis is seasonal and appears more often in the fall and winter months. It is a very common reason for infants to be hospitalized during winter and early spring. It is estimated that by their first year, more than half of all infants have been exposed to RSV. Risk factors include: Exposure to cigarette smoke Age younger ...
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