Multiplicity of Infection (MOI)

Abedon, Stephen T.

doi:10.5281/zenodo.20173633

🔬 Multiplicity of Infection (MOI)

The ratio of adsorbed or infecting phages to total adsorbable or infectable class="bap-term">bacteria.

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

About this entry: Multiplicity of Infection 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

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Multiplicity of Infection: The ratio of adsorbed or infecting phages to total adsorbable or infectable class="bap-term">bacteria.

Discussion

<p>The adsorbed ratio is also described as MOI_actual whereas the added ratio can be referred to as MOI_input.

This is the definition from Adams (1959), p. 441, "Ratio of adsorbed class="bap-term">phage particles to bacteria in a Culture (microbiology)">culture."

External links

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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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