What Causes Bacterial Bronchitis?

Bronchitis can be an acute or chronic condition that causes the airways of your lungs to become inflamed. Acute bronchitis is usually caused by a viral infection, although occasionally bacteria can cause it as well. According to the National Library of Medicine and the Mayo Clinic, causes of bacterial bronchitis include infections and other respiratory disorders.

Allergies

• Allergies to seasonal pollen or year-round irritants--such as dust and pet dander--can make you more vulnerable to respiratory infections such as bronchitis.

Colds

• If you catch the common cold, your immune system may not be able to fight off other infections, which may cause you to get bacterial bronchitis.

GERD

• Gastroesophageal reflux disease may increase your susceptibility to bronchitis by wearing down the lining of your throat and lungs that protects you from infections.

Hospitalization

• Spending time in the hospital for a surgical procedure or other illness may expose you to bacteria or viruses that can cause bronchitis.

Low Immunity

• If you have a medical condition such as AIDS or lupus that causes your immune system to function poorly, you may get bacterial bronchitis.

Pollution

• If you are exposed to environmental pollution or irritants such as tobacco smoke, your lungs may be more susceptible to bronchitis caused by bacteria or viruses.