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. 2017 Apr 24;61(5):e02461-16. doi: 10.1128/AAC.02461-16

TABLE 2.

Ceftriaxone resistance of E. faecium and E. faecalis ΔcroRS mutants expressing croRSEfm

Strain/plasmida Median MIC (μg/ml)b
Without cCF10 With cCF10
E. faecium
    Wild type/vector 128 128
    ΔcroRSEfm mutant/vector 2 2
    ΔcroRSEfm mutant/croRSEfm 2 16
E. faecalis
    Wild type/vector 128 128
    ΔcroRSEfs mutant/vector 8 8
    ΔcroRSEfs mutant/croRSEfm 8 128
a

The strains and plasmids analyzed were as follows: wild-type E. faecium, 1,141,733; E. faecium ΔcroRS mutant, JL537, wild-type E. faecalis, OG1; E. faecalis ΔcroRS mutant, SB35; vector, pJLL105; and croRSEfm, pJLL160.

b

Median MICs are reported from ≥2 biological replicates.