๐Ÿ”ฌ Lysogen

A bacterium that contains an un-induced prophage.

by Stephen T. Abedon Ph.D. (abedon.1@osu.edu)

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About this entry: Lysogen is one of a growing set of phage biology and phage therapy terms defined here. For more phage terms, see Abedon, S.T. (2025). Phage Therapy Annotated Glossary. Preprints.org. 10.20944/preprints202508.0347.v1

phage.org/terms/lysogen.html  ·  Abedon’s Books  ·  DOI: 10.5281/zenodo.20173633

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Lysogen: A bacterium that contains an un-induced prophage.

Discussion

<p>The word lysogen is derived from the concept of lysis generating, where a bacterial culture, when added to a second culture" class="bap-term">bacterial culture, is able to induce the lysis of this second bacterial culture. True lysogens are not curable of this characteristic upon wikipedia.org/wiki/Propagation" target="_blank" class="bap-term">propagation within the presence of anti-phage serum.

By contrast, certain phage-bacterial interactions can exist – described as pseudolysogenic or a phage carrier state – in which lysis generating characteristics in fact may be readily cured in the course of bacterial propagation in the presence of specific anti-phage serum.

This is the definition from Adams (1959), p. 440, for "Lysogenic bacterium": "A bacterium capable of multiplying indefinitely in the infected condition. In lysogenic cultures phage is produced only by exceptional cells that lyse."

External links

References

  • Adams (1959). Bacteriophages. Interscience Publishers, New York.

How to cite this page

Abedon, S.T. (2026). Phage Terms. https://terms.phage.org  ·  10.5281/zenodo.20173633

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Lysogen — terms.phage.orgphage.org — Stephen T. Abedon — Version 2026.05.14