what is a bacteriaphage
DR BRENT GILPIN. A bacteriophage, or a phage, is a virus that infects bacteria, so these don't infect human cells âthey are very specialised and only infect bacteria.So every bacteria is being attacked by various viruses which are using those as the host that they replicate in.SR scientist Dr Brent Gilpin explains that a bacteriophage, or phage, is a virus that infects bacteria. He describes how a phage can be easily detected in the lab by plating bacteria on an agar plate.