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Integrons and their gene cassettes in swine and avian E. coli isolates
| Size of integron (kb) | No. of strains
|
Gene cassettea | |
|---|---|---|---|
| Swine (n = 89) | Avian (n = 71) | ||
| 2.0 | 2 | 0 | dhfr12 aadA2 |
| 2.0 | 1 | 0 | dhfr17 aadA2 |
| 1.5 | 10 | 33 | dhfr1 aadA1 |
| 1.5 | 0 | 1 | dhfr17 aadA2 |
| 1.0 | 3 | 3 | aadA1 |
| 0.7 | 0 | 1 | dhfr13 |
| 1.5, 1.0 | 1 | 0 | dhfr17 aadA2, aadA1 |
| 1.5, 0.7 | 0 | 4 | dhfr17 aadA2, dhfr13 |
aad, aminoglycoside adenyltransferase; dhfr, dihydrofolate reductase.
