Contact-dependent growth inhibition
Contact-dependent growth inhibition (CDI) is a phenomenon where a bacterial cell may deliver a polymorphic toxin molecule into neighbouring bacterial cells upon direct cell-cell contact, causing growth arrest or cell death. == Discovery == CDI is now a blanket term to describe interbacterial competition that relies on direct cell-cell contact in bacteria.
Source: Wikipedia — Contact-dependent growth inhibition (CC BY-SA 4.0)