Lobar pneumonia. Lateral X-ray of the lungs of a 10-year-old boy, showing acute lobar pneumonia of the middle lobe of the right lung. Lobar pneumonia is a bacterial infection that causes inflammation of the lungs. The alveoli (the air sacs of the lungs) become blocked with pus and solidify. The solid areas are visible on X-rays. Symptoms are coughing and chest pain.
Model release not required. Property release not required.