bacteriophage

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With antibiotic resistance a growing threat, scientists are on the hunt for new ways to treat bacterial infections. One of these, called phage therapy, uses a special kind of virus that only infects and kills bacteria.
Yale researchers have discovered a virus that attacks bacteria, also known as bacteriophage (or "phage"), which is capable of infecting Pseudomonas aeruginosa, a highly-feared bacterial pathogen.