Lung abscess is a circumscribed collection of pus in the lung that leads to cavity formation. Aspiration of gastric contents is the most common causative factor. Mixed microbial flora, including anaerobic bacteria and microaerophilic streptococci, are involved in abscess formation related to the ... A lung abscess is a pus-filled cavity within the lung caused by an infection. Learn about the symptoms, causes, diagnosis, treatment, and prognosis. Lung abscess is defined as necrosis of the pulmonary tissue and formation of cavities containing necrotic debris or fluid caused by microbial infection. The formation of multiple small (< 2 cm) abscesses is occasionally referred to as necrotizing pneumonia or lung gangrene. A lung abscess is usually caused by bacteria that normally live in the mouth or throat and that are inhaled (aspirated) into the lungs, resulting in an infection. Often, gum disease (periodontal disease) is the source of the bacteria that cause a lung abscess . The body has many defenses (such as a cough) to help prevent bacteria from getting into the lungs. Infection occurs primarily when a person is unconscious or very drowsy because of alcohol or recreational drug use, medication use ...
