Turning a new phage : Using phages as antibiotics: Nature Medicine :

The idea of using bacteria-fighting viruses as a weapon against hard-to-treat infections is making a surprising comeback, but with a twist on how it has been attempted for nearly a century. Researchers and companies are now tweaking and deconstructing these bacteria killers in an effort to develop a new arsenal against antibiotic-resistant superbugs—one with more potency and a better likelihood of regulatory approval. 
Bacteriophage Wikipedia

Video from A BBC2 Horizon programme (1997): The Virus that Cures – Documentary about the history of phage medicine in Russia and the West