Virusesthat specialize in infecting bacteria are often called bacteriophages, orsimply phages. We've known of some of them from shortly after we startedstudying bacteria, since their spontaneous infections would leave open holes of
what would otherwise be an even lawn of bacteria. We've studied a number of
them in detail, and some of the proteins they encode have become key tools in
our genetic-engineering efforts. And they're not simply oddities that strike
when bacteria are forced to live in artificial lab conditions. Surveys of DNA
obtained in environments from the deep ocean to the subways show that, wherever
you find bacteria, you also find viruses that prey on them
https://arstechnica.com/science/2018/07/researchers-treat-lung-infections-in-mice-with-bacteria-killing-viruses/?utm_source=pocket&utm_medium=email&utm_campaign=pockethits
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