TABLE 1.

Characteristics of the study isolatesa

IsolatePFGE typeMEM MIC (μg/ml)GEN MIC (μg/ml)Highest MEM concn of growth in population analyses (μg/ml)MEM MIC (μg/ml) of heterogeneous subpopulations
KP1Ia21648
KP2Ia222564
KP3Ib22644
KP4Ic42644
KP5Ib411284
KP6II22644
ATCC 13883ND0.060.50.25NA
ATCC 27853ND0.2520.5NA
KP 208III0.120.50.5NA
  • a MEM, meropenem; GEN, gentamicin; ND, not determined; NA, not applicable.