TABLE 3.
Relationship of plasmid replicon types and CTX-M genes among 99 blaCTX-M-positive E. coli isolates from cattle on dairy farms in Washington State
| Plasmid replicon type | No. of isolates |
||||||
|---|---|---|---|---|---|---|---|
| CTX-M group 1 |
CTX-M group 9 |
Subtotal | |||||
| CTX-M-15 | CTX-M-55 | CTX-M-14 | CTX-M-24 | CTX-M-27 | CTX-M-65 | ||
| IncI1 | 24 | 2 | 4 | 1 | 31 | ||
| IncFIB | 8 | 7 | 1 | 10 | 1 | 27 | |
| IncFIA/FIB | 7 | 1 | 1 | 9 | |||
| IncFIA | 1 | 1 | 2 | 3 | 7 | ||
| IncF | 2 | 2 | 4 | ||||
| IncFIA/I1 | 1 | 1 | |||||
| IncA/C | 1 | 1 | |||||
| IncB/O | 1 | 1 | |||||
| IncN | 1 | 4 | 3 | 8 | |||
| NTa | 6 | 2 | 2 | 10 | |||
| Total | 50 | 1 | 16 | 1 | 26 | 5 | 99 |
a
NT, nontypeable: no PCR product was obtained using the standard set of primers for replicon typing (10).