Table 2.

Antimicrobial susceptibilities

Isolate or transformantaResult of testb:
AmpPipPip-tazoCTAZCTXCFTICFOXcCPIMTetT/SGentStrepcChlorCiproSulf
613>16>128>64>16>32>32>2564>8>1>16>256>1626
DH10B 613>16>12832>1616NT>2560.5>8≤0.50.5>256>16≤0.0156
263>16>128>64>16>32>32>2561>8>116>256>160.066
DH10B 263>16>1288>1616NT>2560.5>8>116>256>16≤0.0156
370>16>12864>16>32>321280.5>8>1>16256>160.036
272>16>12864>16>32>321281>8≤0.5>16>256>160.036
DH10B 272>166416>1632NT2561>8≤0.5>16>256>16≤0.0156
274>16>12832>1632NT>2560.5>8≤0.5>16>256>16≤0.0156
447>1612816>16>32322560.5>8≤0.58>256>16≤0.0156
DH10B 447>16648>1616NT1280.25>810.5>256>16≤0.0156
530>1612864>1632321280.5>8≤0.51>256>160.036
DH10B 530>1612832>1632NT>2561>80.50.5>256>16≤0.0156
532>16>128>64>1632>32>2561>8≤0.50.5>256>16≤0.0156
DH10B 532>1612864>16>32NT>2564>810.5>256>16≤0.0156
R1339>16>12864>16>32321280.5>80.50.5>256>16≤0.0156
DH10B R1339>166432>16>32NT>2561>810.5>256>16≤0.0156
R1849>1612832>1632>321280.5>80.50.25>256>16≤0.0156
DH10B R1849>16>128>64>16>32NT>2562>80.50.25>256>16≤0.0156
DH10B4420.5≤0.25NT8≤0.12≤4≤0.50.52564≤0.01522
  • a E. coli transformants are indicated by designations beginning DH10B.

  • b Amp, ampicillin; Pip; piperacillin, Pip-tazo, piperacillin combined with a fixed concentration of tazobactam (4 μg/ml); CTAZ, ceftazidime; CTX, ceftriaxone; CFTI, ceftiofur; CFOX, cefoxitin; CPIM, cefepime; Tet, tetracycline; T/S, trimethoprim/sulfamethoxazole; Gent, gentamycin; Strep, streptomycin; Chlor, chloramphenicol; Sulf, sulfisoxazole; Cipro, ciprofloxacin. Values are MICs (in micrograms per milliliter), except that sulfisoxazole disk results are zone diameters (in nanometers).

  • c Antimicrobial susceptibility determined by E-test methodology.

  • d NT, not tested.