TABLE 3.

MICs of antibiotics (by Etest) for bacteria that survived exposure to antibioticsa

AntibioticbMICcChange in MICNo. of surviving bacteria at the following MIC (μg/ml):
128621.50.750.0120.008
CIP0.008Yes13
AMP1.5Yes31
RIF8Yes31
STR2Yes31
TET2No4
  • a Cultures were derived from four colonies taken after 4 h of antibiotic exposure to the lower concentrations used in Fig. 1.

  • b Abbreviations: CIP, ciprofloxacin; AMP, ampicillin; RIF, rifampin; STR, streptomycin; TET, tetracycline.

  • c Estimated MIC of antibiotic for E. coli CAB1.