Bacterial contamination,coloured scanning electron micrograph (SEM). Escherichia coli bacteria in a cell culture. This contamination has come from an unclean water source. These bacteria are a normal part of the intestinal flora in humans and other animals,where they aid digestion. However,some strains,for instance E. coli O157,can produce a toxin that leads to severe illness,or even death. Normal strains can also produce infections in weakened or immunosuppressed people. Magnification: x6500 when printed at 10 centimetres across | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Gschmeissner, Steve |
Taille de l’image : | 4500 px × 3898 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |