🔬 Monophage

A therapeutic formulation consisting of only a single phage type.

by Stephen T. Abedon Ph.D. Steve Abedon, Ph.D., has taught well over 100 individual classes and ~10 individual courses (including introductory biology, microbiology, physiology, biochemistry, etc.) over his 30+ years as a college professor. He has over 150 publications, including multiple monographs, and is ranked in the top 1 or 2 percent among researchers of all disciplines worldwide. His research focuses on bacteriophage biology and phage therapy. (abedon.1@osu.edu)

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About this entry: Monophage 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
To share a particular section, use the 🔗 link beside its heading, which copies a web address that opens the page right there. To cite this page: Abedon, S.T. (2026). Phage Terms. terms.phage.org.  ·  DOI: 10.5281/zenodo.20173633

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

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Monophage: A therapeutic formulation consisting of only a single phage type.
Also in the Phage Therapy Annotated Glossary: see the entries “Monophage (Pure Line Phage)” (p. 38) and “Pure Line Phage” (p. 48). Read the Glossary · Abedon, S.T. (2025). Preprints.org. doi:10.20944/preprints202508.0347.v1

Discussion

The concept of a monophage is used in contrast to that of phage cocktail, or polyphage. Note that in principle, contrasting one definition of polyphage, one might also use the term monophage to describe a phage virion into which only a single phage genome has been packaged.

The utility of use of a monophage formulation versus a cocktail is the ease of development for monophages. This, however, comes at a cost of versatility, specifically with monophages displaying the narrowest possible antibacterial spectrum of activity, though this breadth will vary depending on phage host range.

References

How to cite this page

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

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