Table 3.
Mean (standard error) number of antimicrobials to which bacterial isolates from canine urine samples were resistant, by year
| Species | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 |
|---|---|---|---|---|---|---|
| All isolates | 1.68 (0.20) | 1.49 (0.16) | 2.12 (0.23) | 1.74 (0.18) | 2.04 (0.18) | 2.74 (0.35) |
| All E. coli | 1.45 (0.18) | 1.37 (0.16) | 1.67 (0.21) | 1.74 (0.24) | 1.55 (0.20) | 2.09 (0.43) |
| E. coli (recurrent)a | 1.71 (0.56) | 1.15 (0.15) | 1.64 (0.36) | 1.83 (0.65) | 2.08 (0.61) | 4.00 (1.01) |
| E. coli (single positive culture) | 1.36 (0.17) | 1.50 (0.24) | 1.67 (0.26) | 1.73 (0.26) | 1.36 (0.17) | 1.05 (0.08) |
| S. intermedius | 1.00 (0.32) | 0.95 (0.27) | 0.88 (0.45) | 0.64 (0.15) | 1.00 (0.22) | 1.20 (0.49) |
| Enterococcus spp. | 2.17 (0.48) | 3.14 (0.99) | 5.29 (0.97) | 2.86 (0.59) | 3.41 (0.45) | 5.43 (0.30) |
| Proteus spp. | 3.20 (0.20) | 3.00 (0.82) | 3.33 (0.33) | 3.75 (0.48) | 3.55 (0.43) | 4.25 (1.25) |
a
Denotes significant change in resistance during the study period (P < 0.05) based on analysis by Kruskal-Wallis test