The production of cholera toxin by virulent strains of Vibrio cholera is dependent upon genes in a bacteriophage.This is an example of

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Lysogenic conversion refers to the ability of a bacteriophage to transfer genes encoding specific traits into a bacterial host. In this case, the genes involved in cholera toxin production are located on a bacteriophage that infects Vibrio cholera. As a result of lysogenic conversion, the bacterium gains the ability to produce cholera toxin, which contributes to its virulence.

The Production of Cholera Toxin by Virulent Strains of Vibrio