TABLE 6.

Relationships among serovars, antimicrobial resistances, and plasmid profiles of E. coli isolates

TrialPenE.coli serovaraAntimicrobial resistance patternbPlasmid profile (MDa)c
11O8:H9AMP-STR2.8, 1.0
O77:H18AMP-CIP-NAL-(STR)-(SUL)-TET96, 60, 30, (1.0)
O92:NM(AMP)-KAN-NEO-SPT-STR-SUL-TET80, 66, 18, 4.8, 2.0
2O8:H9AMP-STR(80), (66), 2.8, 1.0
O77:H18AMP-CIP-NAL-(STR)-(TET)96, 60, 30
O92:NM(AMP)-KAN-NEO-SPT-STR-SUL-TET80, 66, 18, 4.8, 2.0
3O8:H9AMP-STR80, 66, 2.8, 1.0
O17:H18KAN-NEO-SUL-TETNONE
O77:H18AMP-CIP-NAL-(STR)-TET96, 60, 30
O168:H7AMP-AMC-CEF-CRO-(CFT)-FOX-SPT-SUL72, 66
4O8:H9AMP-STR2.8, 1.0
O77:H18AMP-CIP-NAL-STR-TET96, 60, 30, (1.0)
O92:NM(AMP)-(GEN)-KAN-NEO-(SPT)-STR-SUL-TET80, 66, 18, 4.8, 2.0
21O8:H9AMP-STR2.8, 1.0
O159:H28Susc.None
2O11:H11SPT-SUL90, 84
3O101:H9Susc.96, 3.6, 3.0, 1.0
O101:H9AMP-AMC-CEF-FOX-SPT-SUL96 or 80, 72, 3.6, 3.0, 1.0
O168:H7AMP-AMC-CEF-CRO-(CTF)-FOX-SPT-SUL72, 66
4O8:H9AMP-STR80, 66, 24, 2.8, 1.0
O17:H18KAN-NEO-SUL-TETNone
O17:H18AMP-CIP-NAL-TET96, 60, 30
O92:NMKAN-NEO-(SPT)-STR-SUL-TET80, 66, 18, 2.0
  • a None of the E. coli isolates were verotoxigenic. NM, nonmotile.

  • b Antimicrobials shown in parentheses are those to which the isolates may or may not be additionally resistant.

  • c Those plasmids indicated in parentheses may or may not be present. The 72-MDa plasmid indicated in bold was the only one that hybridized with the cmy-2 probe.