CNRI / SCIENCE PHOTO LIBRARY CNRI / SCIENCE PHOTO LIBRARY
False-colour scanning electron micrograph (SEM) of Clostridium tetani, the species of Gram-positive, spore-forming, rod-like bacteria that causes tetanus. The spherical endospore appears as a swelling on top end of each bacterium: 1 resting endospore is produced from 1 vegetative bacterial cell & germinates to give rise to a single cell (ie overall process is not one of multiplication). C. tetani exists harmlessly in intestines of man and animals but becomes pathogenic (causes tetanus) when introduced through a wound (where the anaerobic environment necessary for growth is found). Magnification: X 4,700 at 35mm size.
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