Table 3

MICs of piperacillin and piperacillin-inhibitor combinations for Y105 variants

StrainMIC (mg/liter)a
PIPPIP/TAZOPIP/penem
DH10B222
SHV-12,048>5122
Y105A128162
Y105C32162
Y105D1682
Y105E3242
Y105F5125122
Y105G128322
Y105H12882
Y105I25682
Y105K1682
Y105L3282
Y105 M512162
Y105N256322
Y105P256322
Y105Q128162
Y105R128322
Y105S256642
Y105T12832<2
Y105V25664<2
Y105W1,024>512<2
  • ↵a Values are modes of 3 determinations. PIP, piperacillin; PIP/TAZO, piperacillin-tazobactam with a fixed tazobactam concentration of 4 mg/liter; PIP/penem, piperacillin–penem-1 with fixed penem-1 concentration of 4 mg/liter.