Lung abscesses are often a complication of pneumonia caused by bacteria. Aspiration of food, a foreign object, bronchial stenosis, or neoplasms may cause pulmonary abscesses to form. A pulmonary abscess also may develop when a septic embolism is carried to the lung via the pulmonary circulation.

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Background factors include periodontal disease, gingivitis, sinus infection, IV drug abuse, and general anesthesia or other causes of reduced levels of consciousness.

Lung Abscesses Are Often a Complication of Pneumonia Caused by Bacteria