DR GARY GAUGLER / SCIENCE PHOTO LIBRARY DR GARY GAUGLER / SCIENCE PHOTO LIBRARY
Staphylococcus aureus bacteria. Coloured scanning electron micrograph (SEM) of Staphylococcus aureus bacteria, a common cause of skin infections. This gram-positive bacterium is spherical (coccus) and grows in clusters. It is harmlessly present in most people on the skin and in the mucous membranes of the nose and throat. Infection occurs if bacteria are trapped within a blocked sweat or sebaceous gland, or when skin becomes broken. Infection can result in boils, pustules and internal abscesses. Magnification unknown.
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