T-bacteriophages and e-coli


T-bacteriophages on E.coli. Colored TEM of T-Baccteriophage viruses attacking a bacterial cell of Escherichia coli. Seven virus particles are seen (blue), each with a head and a tail. Four of these are "sitting" on the brown bacterial cell and small blue "tails" of genetic material (DNA) are injected into the bacterium. T-bacteriophages are parasites of bacterial cells. The virus attaches itself to the cell's wall and, using it's tail as a syringe, injects it's own DNA into the bacterium. The virus DNA then takes over the bacterial cell, forcing it to produce more viruses.

Credit: Eye of Science / Science Source

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