TABLE 4.

MICs of β-lactams for E. coli and A. baumannii strains

β-LactamaMIC (μg/ml) of β-lactam for strainb:
E. coliA. baumannii
DH10B (pOXA-23)DH10B (pOXA-40)DH10B (pOXA-58)DH10B (pAT801-RA)CIP 70.10 (pOXA-23)CIP 70.10 (pOXA-40)CIP 70.10 (pOXA-58)CIP 70.10 (pAT801-RA)BM4547 (pOXA-23)BM4547 (pOXA-40)BM4547 (pOXA-58)BM4547 (pAT801-RA)
AMX>256>256>2564>256>256>25632>256>256>25664
TIC>256>256>2564>256>256>2564>256>256>2568
CAZ0.060.060.060.0644424444
CTX0.120.120.120.121616168>32>32>32>32
FEP0.120.120.120.062221>32>32>32>32
CPO0.120.120.120.064422>32>32>32>32
ATM0.120.120.120.121616161616161616
IPM0.250.50.250.06440.50.258810.5
MEM0.060.060.060.06440.50.258810.5
  • a AMX, amoxicillin; TIC, ticarcillin; CAZ, ceftazidime; CTX, cefotaxime; FEP, cefepime; CPO, cefpirome; ATM, aztreonam; IPM, imipenem; MEM, meropenem.

  • b MICs of β-lactams for E. coli DH10B harboring recombinant plasmid pOXA-23, pOXA-40, or pOXA-58; E. coli DH10B reference strain harboring plasmid pAT801-RA; A. baumannii CIP 70.10 harboring recombinant plasmid pOXA-23, pOXA-40, or pOXA-58; A. baumannii CIP 70.10 reference strain harboring plasmid pAT801-RA; A. baumannii BM4547 harboring recombinant plasmid pOXA-23, pOXA-40 or pOXA-58; and A. baumannii BM4547 reference strain harboring plasmid pAT801-RA.