Enterobacteria phage P22

The Enterobacteria phage P22 is a bacteriophage related to bacteriophage λ that infects Salmonella typhimurium. Like many phage viruses, it has been used in molecular biology to induce mutations in cultured bacteria and to introduce foreign genetic material. Upon its discovery, P22 has been used in generalized transduction and is an important tool for Salmonella genetics.