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Viruses can turn harmless E. coli dangerous
Bacteriophages are bacteria that affect viruses. E. Coli are bacteria that are in the gut of all warm-blooded animals, and the majority of strains are not harmful. The harmful strains produce a protein called Shiga toxin. The gene coding for the Shiga toxin is not naturally in E. Coli, but comes from bacteriophages. Some strains of E. Coli are not effected by those bacteriophages, but can spread them to other E. Coli leading to more E. Coli...
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