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Resistance to individual antimicrobial agents among E. coli isolates from dogs in the northeastern USA, 2004–2011
| Antimicrobial agent | Number of isolates tested | % Resistant |
|---|---|---|
| Ampicillin | 3480 | 34.3 |
| Cephalothin | 1325 | 27.9 |
| Tetracycline | 2974 | 23.6 |
| Cefazolin | 1669 | 22.9 |
| Cefoxitin | 1686 | 19.9 |
| Enrofloxacin | 3473 | 18.1 |
| Trimethoprim/sulfamethoxazole | 3474 | 17.9 |
| Amoxicillin/clavulanic acid | 3476 | 15.7 |
| Gentamicin | 1713 | 15.5 |
| Chloramphenicol | 1711 | 12.6 |
| Amikacin | 1711 | 0.4 |
