Transmission electron micrograph (TEM) of a Clostridium tetani bacterial spore. The bacterium causes tetanus (lockjaw). Here,a thick walled endospore has developed with many membranes forming its coat (purple). This is a resting phase of the bacteria induced by adverse conditions,and the spore will germinate when conditions become favourable. C. tetani exists in soil and harmlessly in the intestine of man and domestic animals; it becomes pathogenic when introduced into a wound. The disease of tetanus,sometimes fatal,leads to painful muscle spasms and stiffness. Vaccination is effective. Magnification: x8,500 at 6x7cm size | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / CNRI |
Taille de l’image : | 3246 px × 2628 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |