CNRI / SCIENCE PHOTO LIBRARY CNRI / SCIENCE PHOTO LIBRARY
Coloured transmission electron micrograph (TEM) of bacteria Staphylococcus aureus, showing a complete bacterium (centre) & another undergoing lysis due to effects of antibiotics (top right). Lysis (the death of the individual bacterium) occurs through the destruction of the outer plasma membrane (appears blue around complete bacterium), & the release of intracellular contents into the surrounding medium. S. aureus (a species of spherical, non-motile, Gram-positive bacteria) is responsible for pus containing infections such as boils and abscesses. S. aureus also secretes an exotoxin causing a type of acute gastro-enteritis. Mag: x41,000 at 6x7cm, x20,500 at 35mm size.
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