Escherichia coli bacterial culture. Close-up of a petri dish culture of the bacterium Escherichia coli. E. coli bacteria are a normal part of the inte
Escherichia coli bacterial culture. Close-up of a petri dish culture of the bacterium Escherichia coli. E. coli bacteria are a normal part of the intestinal flora in humans and other animals, where they aid digestion. However, some strains can produce a toxin that leads to severe illness, or even death. Normal strains can also produce infections in those with weakened immune systems. This culture was grown on CPS agar, a chromogenic medium used to detect E. coli.
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