TABLE 2.

MICs of tetracycline, chlortetracycline, and oxytetracycline for E. coli clones and A. pyogenes strain BBR1

StrainMIC (μg/ml) of:
TetracyclineChlortetracyclineOxytetracycline
DH5αMCR(pBC KS)0.250.121
DH5αMCR(pJGS259)16832
DH5αMCR(pJGS264)0.250.120.5
DH5αMCR(pJGS279)323264
BBR1888
BBR1 + tetracyclinea888
  • a BBR1 was grown on BHI-blood agar supplemented with 1 μg of tetracycline per ml prior to determination of the MIC.