MICHEL BRAUNER, ISM / SCIENCE PHOTO LIBRARY MICHEL BRAUNER, ISM / SCIENCE PHOTO LIBRARY
Bacterial pneumonia. Coloured axial computed tomography (CT) scan through the lungs of a 53-year-old man, showing a partial lesion of the upper lobe of the right lung (far left) due to bacterial pneumonia. This is a bacterial infection that causes inflammation of the lungs. The alveoli (the air sacs of the lungs) become blocked with pus and solidify. Symptoms are coughing and chest pain.
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