Table 2.

MICs of β-lactams for S. enteritidisKF92, its transconjugant, its transformant, E. coliJM101, E. coli HB101, E. coli J53-2 producing BIL-1, E. coli C600 producing MIR-1, and the transformants with pNH5a

StrainPlasmidBlaMIC (mg/liter)
AMXAMCTICMECCFFOXCTXMOXFEPATMIMP
S. enteritidis pSAL1DHA-1≥512≥512>2564≥1,024512≥6432241
E. coliHB1018840.5880.120.250.120.060.25
E. coliHB101pSAL1DHA-1≥512≥5121280.51,0241281610.1211
E. coli HB101pSAL1 + pNH5DHA-1≥512512640.51,0243280.50.120.121
E. coliJM1018440.51640.250.120.120.120.5
E. coliJM101pSAL2-indDHA-1≥512256≥2561≥1,0242566440.521
E. coliJ53-2J62.6BIL-1≥512≥51212841,0241283220.5ND1
E. coli J53-2J62.6 + pNH5BIL-1≥512≥51212841,0241283220.5ND1
E. coliC600pMG231MIR-1≥512≥5121284≥1,0245123280.25ND1
E. coli C600pMG231 + pNH5MIR-1≥512≥5121284≥1,0245123280.25ND1
  • a Abbreviations: Bla, β-lactamase; AMX, amoxicillin; AMC, amoxicillin plus clavulanic acid (2 mg/ml); TIC, ticarcillin; MEC, mecillinam; CF, cephalothin; FOX, cefoxitin; CTX, cefotaxime; MOX, moxalactam; FEP, cefepime; ATM, aztreonam; IMP, imipenem; ND, not done.