๐Ÿ”ฌ Bull's Eye Plaque

Phage-mediate clearing within a bacterial lawn in which the center is clearer (less turbid) than the outer edges.

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

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About this entry: Bull's Eye Plaque 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/bulls_eye_plaque.html  ·  Abedon’s Books  ·  DOI: 10.5281/zenodo.20173633

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Bull's Eye Plaque: Phage-mediate clearing within a bacterial lawn in which the center is clearer (less turbid) than the outer edges.

Discussion

<p>Plaques with turbid centers are seen especially with where the bacteria forming the center turbidity are microcolonies of bacteria descended from newly formed bacterial lysogens. These microcolonies are larger in the middle because they are descended from the earliest forming lysogens within these plaques.

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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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Bull's Eye Plaque — terms.phage.org — phage.org — Stephen T. Abedon — Version 2026.05.14