BSIP VEM / SCIENCE PHOTO LIBRARY BSIP VEM / SCIENCE PHOTO LIBRARY
Streptococcus pneumoniae. Coloured Scanning Electron Micrograph of Streptococcus pneumoniae, also known as Pneumococcus, a bacterium that can cause pneumonia. S. pneumoniae are gram-positive bacteria. The cells are oval or lancet shaped, and often occur in short chains, as here. The cells possess capsules which resist ingestion by phagocytes of the host's immune system. Although often found living harmlessly in the body, S. pneumoniae can produce dangerous opportunistic pneumonia infections, often as a complication of serious disease when the victim's immunity is compromised. Pneumonia kills about 27000 people in the UK each year. Magnification x7800 at 35mm size.
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