KALLISTA IMAGES, CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY KALLISTA IMAGES, CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY
Pneumonia. Chest X-ray of a two and a half year old boy with right (left) middle lobe pneumonia that developed as a complication of an influenza A infection. Pneumonia is most commonly caused by the bacteria Streptococcus pneumoniae. The pathogen is inhaled into a lung segment, or lobe, where it causes the alveoli (air sacs) to become blocked with pus. Symptoms include fever and chills, a cough with rusty-coloured or pus-like sputum and chest pain. Treatment is with antibiotics.
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