the change in phenotype of a bacterium (in terms of its morphology or synthetic properties) accompanying lysogeny (q.v.). Lysogenic cells exhibit immunity to superinfection by the same phage as that in the prophage state. Toxin production by Corynebacterium diphtheriae only occurs in strains that are lysogenic for phage beta.
(bacterio)phage conversion or prophage-mediated conversion or lysogenic conversion
the introduction of new properties to a host bacterium by the genome of an infecting lysogenic prophage. Such properties may include resistance to lysis by related phages, changes in antigenic constitution, or the appearance of toxigenicity.