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Clostridium perfringens bacterium with spore

Clostridium perfringens bacterium with spore

B220/0531

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Credit

CNRI / SCIENCE PHOTO LIBRARY CNRI / SCIENCE PHOTO LIBRARY

Caption

False-colour transmission electron micrograph (TEM) of a Clostridium perfringens bacterium with endospore. This species of Gram-positive, spore- forming soil bacteria is seen towards the end of spore formation (sporulation). At lower centre, it has developed an endospore (green) with membrane (red). This is a resting phase induced by adverse conditions, & the spore will germinate when condi- tions become favourable. C.perfringens causes blood poisoning, food poisoning & gas gangrene in humans. It produces an exotoxin (alpha-toxin) that can digest human tissue, and contaminate meat food sources. Magnification: x20,000 at 6x7cm size.

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