Table 2.
Antimicrobial susceptibility and importance ratings for the most prevalent urinary isolates from dogs. Amox: amoxicillin; TMS: trimethoprim-sulfonamide; Tetra: tetracycline; Doxy: doxycycline; Erythro: erythromycin; Gentam: Gentamicin; Amox-Clav: amoxicillin-clavulanate; Ceph: cephalexin; Enroflox: enrofloxacin.
| Low-Importance Antimicrobials |
Medium-Importance Antimicrobials |
High-Importance Antimicrobials | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Organism | n | % of Dog Isolates | Amox | TMS | Tetra | Doxy | Erythro | Gentam | Amox-Clav | Ceph | Cefovecin | Enroflox |
| Escherichia coli | 2058 | 55% | 75% | 93% | 82% | 98% | IR | 93% | 97% | 90% | 90% | 95% |
| Proteus mirabilis | 401 | 11% | 91% | 94% | IR | IR | IR | 100% | 99% | 95% | 97% | 99% |
| Staphylococcus pseudintermedius | 380 | 10% | 91% | 93% | 76% | 85% | 75% | 89% | 98% | 95% | 95% | 98% |
| Enterococcus faecalis | 351 | 9.3% | 96% | IR | 54% | 91% | 76% | 95% * | 95% | IR | IR | 0.9% |
| Proteus spp. | 288 | 7.7% | 87% | 92% | 1.6% ** | 0% ** | IR | 100% | 98% | 96% | 94% | 98% |
| Enterobacter spp. | 157 | 4.2% | IR | 86% | 86% | 100% | IR | 100% | IR | IR | IR | 96% |
| Streptococcus canis | 111 | 2.9% | 96% | 96% | 84% | 97% | 89% | IR | 97% | 90% | 89% | 4.8% |
| Coagulase-negative Staphylococcus spp. | 89 | 2.4% | 87% | 93% | 86% | 86% | 93% | 95% | 97% | 94% | 92% | 98% |
* Enterococci were tested against a higher-potency gentamicin disc (120 µg) to detect high-level resistance. ** Some Proteus spp. are intrinsically resistant, and others are not, but it was not possible to separate species with the data available. IR = intrinsic resistance. Gray = fewer than 30 isolates of this species/genus were tested against this antimicrobial, and/or this species/genus is intrinsically resistant to this antimicrobial; Green = more than 80% of isolates susceptible; Yellow = 60%−80% isolates susceptible; Pink = less than 60% of isolates susceptible.