CNRI / SCIENCE PHOTO LIBRARY CNRI / SCIENCE PHOTO LIBRARY
False-colour transmission electron micrograph (TEM) of an individual bacterium of the species Staphylococcus aureus, a member of a genus of spherical, Gram-positive, non-motile bacteria. Many species cause disease in man through secretion of exotoxins: S. aureus is commonly present on skin mucous membranes & causes boils & internal abscesses. S. pyogenes albus & S. pyogenes aureus are associated with suppurative (pus forming) infections. Other species produce toxins causing food poisoning. Magnification: x26,000 at 35mm size, x52,000 at 6x7cm size.
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