<prompt> Bacteriophages are mostly needed forBacterial identificationEpidemiologicallyAs antibacterial agentConversion propey in bacteria  <response>: Ans. is a i.e., Bacterial identification The specificity of bacteriophage-bacterium interaction is made use of in identification and typing of bacteria. Bacteriophage phage . Bacteriophages are viruses that infect bacteria. . Phages play an impoant role in the transmission of genetic information between bacteria by the process of transduction. . The presence of phage genome integrated with bacterial chromosome confer bacteria ceain propeies by a process known as phage conversion. . Phages have been used as cloning vectors in genetic manipulation. 