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The ail mutation confers resistance to phages in Y. pestis. (A) Ten-fold dilution of Yep-phi lysates applied to bacterial lawns of wild-type and mutant strains. The maximum titer of bacteriophage is 4.35 × 107 PFU. (B) Efficiency of plating (EOP) for different strains. (C, D) Yep-phi adsorption and adsorption kinetics to Y. pestis 201 and its mutant strains. # P< 0.0001. ns, non-significant.
