TABLE 6.
Relationships among serovars, antimicrobial resistances, and plasmid profiles of E. coli isolates
| Trial | Pen | E.coli serovara | Antimicrobial resistance patternb | Plasmid profile (MDa)c |
|---|---|---|---|---|
| 1 | 1 | O8:H9 | AMP-STR | 2.8, 1.0 |
| O77:H18 | AMP-CIP-NAL-(STR)-(SUL)-TET | 96, 60, 30, (1.0) | ||
| O92:NM | (AMP)-KAN-NEO-SPT-STR-SUL-TET | 80, 66, 18, 4.8, 2.0 | ||
| 2 | O8:H9 | AMP-STR | (80), (66), 2.8, 1.0 | |
| O77:H18 | AMP-CIP-NAL-(STR)-(TET) | 96, 60, 30 | ||
| O92:NM | (AMP)-KAN-NEO-SPT-STR-SUL-TET | 80, 66, 18, 4.8, 2.0 | ||
| 3 | O8:H9 | AMP-STR | 80, 66, 2.8, 1.0 | |
| O17:H18 | KAN-NEO-SUL-TET | NONE | ||
| O77:H18 | AMP-CIP-NAL-(STR)-TET | 96, 60, 30 | ||
| O168:H7 | AMP-AMC-CEF-CRO-(CFT)-FOX-SPT-SUL | 72, 66 | ||
| 4 | O8:H9 | AMP-STR | 2.8, 1.0 | |
| O77:H18 | AMP-CIP-NAL-STR-TET | 96, 60, 30, (1.0) | ||
| O92:NM | (AMP)-(GEN)-KAN-NEO-(SPT)-STR-SUL-TET | 80, 66, 18, 4.8, 2.0 | ||
| 2 | 1 | O8:H9 | AMP-STR | 2.8, 1.0 |
| O159:H28 | Susc. | None | ||
| 2 | O11:H11 | SPT-SUL | 90, 84 | |
| 3 | O101:H9 | Susc. | 96, 3.6, 3.0, 1.0 | |
| O101:H9 | AMP-AMC-CEF-FOX-SPT-SUL | 96 or 80, 72, 3.6, 3.0, 1.0 | ||
| O168:H7 | AMP-AMC-CEF-CRO-(CTF)-FOX-SPT-SUL | 72, 66 | ||
| 4 | O8:H9 | AMP-STR | 80, 66, 24, 2.8, 1.0 | |
| O17:H18 | KAN-NEO-SUL-TET | None | ||
| O17:H18 | AMP-CIP-NAL-TET | 96, 60, 30 | ||
| O92:NM | KAN-NEO-(SPT)-STR-SUL-TET | 80, 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.