MICHAEL ABBEY / SCIENCE PHOTO LIBRARY MICHAEL ABBEY / SCIENCE PHOTO LIBRARY
E.coli causing blood poisoning. Light micrograph of rod-shaped Escherichia coli bacteria (blue) in a human blood culture. Several blood cells (pale pink) can also be seen. E. coli bacteria normally inhabit the intestine and are usually harmless. They can enter the bloodstream from the gut during gastro-enteritis or through an abscess. If they multiply in the blood they can cause blood poisoning (septicaemia). Septicaemia can cause fever, chills, headaches, rashes, jaundice and a large drop in blood pressure. Phase- contrasted images like this reduce the colour saturation of objects but increase the level of observable detail. Magnification: x1000 at 35mm size.
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