Table 2.

Antimicrobial susceptibilities of clinicalK. pneumoniae isolates and theirE. coli transconjugants

AntibioticsaMIC (μg/ml) for the following isolates:
1027/961099/961294/961298/961590/961592/961042/961289/96R+b [1042/96]R+ [1289/96]L-267cR+ [L-267]cA15 R
Ampicillin>512>512>512>512>512>512>512>512512512>512>5122
Pip>512>512>512512>512>512>512>5126432>5122560.5
Pip + Taz222224840.50.580.50.5
Ctx643232163264643242328≤0.03
Ctx + Clav0.060.060.1250.060.060.125≤0.030.06≤0.03≤0.030.25≤0.03≤0.03
Ctx + Taz0.060.060.1250.060.060.1250.1250.125≤0.03≤0.030.25≤0.03≤0.03
Caz1281286432641282561283216128320.06
Caz + Clav0.50.50.50.250.510.50.50.1250.060.50.1250.06
Caz + Taz0.50.50.250.250.250.5110.250.1250.50.1250.06
Atm256256128641282565122566432128320.06
Atm + Clav0.250.1250.1250.060.060.1250.060.060.06≤0.030.1250.06≤0.03
Atm + Taz0.250.1250.1250.060.060.1250.50.250.1250.060.250.06≤0.03
Imipenem0.1250.1250.250.1250.1250.250.1250.1250.1250.250.1250.250.25
Gentamicin64646464641280.250.1250.1250.12564160.125
Tobramycin88888160.50.50.1250.1251620.25
  • a Pip, piperacillin; Taz, tazobactam; Ctx, Cefotaxime; Clav, clavulanate; Caz, ceftazidime.

  • b R+, transconjugant strain.

  • c Reference 14 (excluding the MICs of aminoglycosides).