When growth of these isolates was measured by optical density (OD) at an initial MOI of 100 to further test for resistance, we did not observe a clear trend in the maximum OD achieved; however, all final densities were depressed compared to phage free controls and AbiZ + (IL7) bacteria achieved higher densities overall (S7 Fig in S1 File ).
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The contribution of abortive infection to preventing populations of Lactococcus lactis from succumbing to infections with bacteriophage.
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