bacteriophage plaque

What Is A Bacteriophage Plaque? 1 Introduction. A phage plaque is a clearing in a bacterial lawn. Plaques form via an outward diffusion of phage virions that is fed by bacterial infection. Anything that slows phage diffusion can impede plaque development and thereby plaque size. What is a plaque in microbiology? Plaque, in microbiology, a