DR GARY GAUGLER / SCIENCE PHOTO LIBRARY DR GARY GAUGLER / SCIENCE PHOTO LIBRARY
Staphylococcus aureus bacterium. Coloured scanning electron micrograph (SEM) of a Staphylococcus aureus bacterium, a common cause of skin infections. This spherical bacterium (coccus) is gram-positive. 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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