Table 3.
Antimicrobial susceptibility and importance ratings for the most prevalent urinary isolates from cats. 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 Cat Isolates | Amox | TMS | Tetra | Doxy | Erythro | Gentam | Amox-Clav | Ceph | Cefovecin | Enroflox |
| Escherichia coli | 1236 | 67% | 80% | 94% | 82% | 82% | IR | 100% | 99% | 92% | 93% | 97% |
| Enterococcus faecalis | 285 | 15% | 98% | IR | 53% | 87% | 77% | 95% * | 99% | IR | IR | 1.4% |
| Staphylococcus pseudintermedius | 133 | 7.2% | 91% | 97% | 89% | 100% | 100% | 100% | 100% | 93% | 94% | 100% |
| Coagulase-negative Staphylococcus spp. | 88 | 4.8% | 98% | 100% | 100% | 100% | 100% | 100% | 99% | 98% | 98% | 100% |
| Proteus mirabilis | 39 | 2.1% | 87% | 92% | IR | IR | IR | 0.0% | 100% | 95% | 95% | 97% |
| Enterobacter spp. | 33 | 1.8% | IR | 76% | 100% | 100% | IR | 100% | IR | IR | IR | 97% |
| Proteus spp. | 22 | 1.2% | 82% | 73% | 0% ** | 0% ** | IR | 100% | 96% | 87% | 82% | 100% |
| Streptococcus canis | 14 | 0.8% | 100% | 86% | 86% | 100% | 100% | IR | 100% | 100% | 100% | 0% |
* 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.