DAVID SCHARF / SCIENCE PHOTO LIBRARY DAVID SCHARF / SCIENCE PHOTO LIBRARY
Bacillus bacteria. Coloured scanning electron micrograph (SEM) of Bacillus sp. bacteria. All the Bacillus bacteria are Gram type positive. They are typically saprotrophs, organisms that feed and grow on dead and decaying organic material. Some Bacillus bacteria can cause infection in humans. These bacteria were cultured from house dust. Magnification: x3,600 at 6x7cm size.
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