lysogenic bacteriophage

The presence of lysogenic bacteriophage T12 can be tested through plaque assays if the indicator strain utilized is susceptible to the phage being tested.

Permanent lysogens differ from lysogenic bacteriophages in that the host cells are not lysed after the induction of Fuselloviridae production and eventually return to the lysogenic state.

Lysogenic bacteriophages are not generally used therapeutically, as this group can act as a way for bacteria to exchange DNA; this can help spread antibiotic resistance or even, theoretically, make the bacteria pathogenic (see Cholera).