Table 1.

Microbiological activities of β-lactam antibiotics with strain RYC1000 producing β-lactamases

β-lactamase (TEM type)MIC (μg/ml)
AMCERCTXCAZATMCE
No TEMa ≤3240.03≤0.06≤0.0152
TEM-1>2,048320.030.120.0632
S164 (TEM-12)>2,048160.1240.258
T2372,048320.030.120.0632
K240>2,048640.030.50.2532
S164-T2371,024160.2510.1232
S164-K240 (TEM-10)>2,048160.51281616
T237-K2402,048640.060.250.06128
S164-T237-K240 (TEM-5)1,024324162128
  • a Strain RYC1000 containing plasmid pBGS19.