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 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / CNRI |
Taille de l’image : | 3147 px × 4559 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |