Abstract
The coevolution of bacteria and their infecting phages involves a constant arms race for bacteria to prevent phage infection and phage to overcome these preventions. Although a diverse array of phage defense systems is well characterized in bacteria, very few phage restriction systems are known in mycobacteria. The DS6A mycobacteriophage is unique in the mycobacterial world in that it forms plaques only on members of the Mycobacterium tuberculosis complex. However, the novel DS6A reporter phages developed in this work demonstrate that DS6A can infect nontuberculous mycobacteria at various efficiencies. By comparing the abilities of DS6A and another phage, TM4, to infect and form plaques on various mycobacterial species, we can begin to discern new phage restriction systems employed within the genus.
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