What does a clear plaque on a bacterial lawn indicate?

In microbiology, a clear plaque on a bacterial lawn indicates that bacterial cells have been inhibited or dissolved by an agent, such as a virus or an antibiotic. This clear area is a sensitive laboratory indicator of the presence of an antibacterial factor. Bacteriophages, which are viruses that infect bacteria, can cause these clearings through their lytic life cycle, where they destroy the host cell.123