Lobar pneumonia. Coloured axial computed tomography (CT) scan through the lungs (blue) of a 48-year-old woman in intensive care, showing a partial lesion (green) of the upper lobe of the right lung due to pneumonia. Lobar pneumonia is a bacterial infection that causes inflammation of the lungs. The infection here is with Pneumococcus bacteria. The alveoli (the air sacs of the lungs) become blocked with pus and solidify. Symptoms are coughing and chest pain.
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