Escherichia coli bacteria, coloured scanning electron micrograph (SEM). E. coli bacteria are a normal part of the intestinal flora in humans and other

---

Escherichia coli bacteria, coloured scanning electron micrograph (SEM). E. coli 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.

---

Size: 4825px × 3619px
Photo credit: © MARTIN OEGGERLI/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bacillus, bacteria, bacterial, bacteriology, bacterium, biological, biology, cell, cells, coli, coloured, enteric, escherichia, false-coloured, flora, gram-negative, intestinal, medical, medicine, micro-organism, micro-organisms, microbe, microbes, microbiological, microbiology, normal, pathogen, pathogenic, rod, rod-shaped, sem, shaped