๐Ÿ”ฌ Absolute Efficiency of Plating

Ratio of virion particles present as determined microscopically to number of plaques that the same stock is capable of producing.

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

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About this entry: Absolute Efficiency of Plating 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/absolute_efficiency_of_plating.html  ·  Abedon’s Books  ·  DOI: 10.5281/zenodo.20173633

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Absolute Efficiency of Plating: Ratio of virion particles present as determined microscopically to number of plaques that the same stock is capable of producing.

Discussion

<p>At least in principle, the following relationship should hold (brackets are indicative of concentrations):

     [Total virion count] ≥ [Killing titer] ≥ [Plaque-forming units]

That is, there may be more wikipedia.org/wiki/Microscopic" target="_blank" class="bap-term">microscopically countable virion particles, i.e., as via electron microscopy, than there are virions that are present which are capable of killing bacteria than there are virions that are capable of forming plaques, with

     [Plaque-forming units]/[Total viron count] = Absolute efficiency of plating.

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How to cite this page

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

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Absolute Efficiency of Plating — terms.phage.org — phage.org — Stephen T. Abedon — Version 2026.05.14