STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
E. coli induced cell death. Coloured scanning electron micrograph (SEM) of a macrophage white blood cell (centre) that is being destroyed by toxins released by Escherichia coli bacteria (red). These toxins disrupt the macrophage's cell membrane, resulting in death of the cell.
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