PR. MICHEL BRAUNER / ISM / SCIENCE PHOTO LIBRARY PR. MICHEL BRAUNER / ISM / SCIENCE PHOTO LIBRARY
Staphylococcal pneumonia and pneumothorax. Coloured axial computed tomography (CT) scan showing a section through the lungs of a 62-year-old patient with pneumonia contracted in hospital. Multiple pulmonary abscesses are present in both lungs (blue), and significant pneumothorax, a large pocket of air (black, upper right), has expanded the pleural cavity and compressed the patient's left lung. In bacterial pneumonia, the pathogen is inhaled into a lung segments, or lobes, where it causes the alveoli (air sacs) to become blocked with pus. Treatment is with antibiotics. Surgical insertion of a chest tube is used to drain air and fluid from a pneumothorax.
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