Table 2. Summary of bacterial isolates obtained from submitted samples of animals treated with bacteriostatic/bactericidal antimicrobial agents.
| Year | 2013 | 2014 | 2015 | Total | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Organisms (culture) | MH | PM | HS | MH | PM | HS | MH | PM | HS | |
| Isolates from submissions with treatment history | 113 | 56 | 52 | 127 | 90 | 81 | 106 | 94 | 62 | 781 |
| Total isolates/year | 221 | 298 | 262 | |||||||
| Isolates from non-treated cases | 28 | 19 | 13 | 27 | 29 | 17 | 25 | 19 | 17 | 194 |
| 60 | 73 | 61 | ||||||||
| Isolates from first-line bactericidal treatment | ||||||||||
| Ampicillin | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 2 | 0 | 3 |
| Ceftiofur | 14 | 1 | 5 | 15 | 10 | 11 | 13 | 8 | 4 | 81 |
| Danofloxacin | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 3 |
| Enrofloxacin | 12 | 5 | 6 | 10 | 9 | 11 | 13 | 14 | 5 | 85 |
| Penicillin | 2 | 2 | 0 | 0 | 0 | 0 | 2 | 2 | 1 | 9 |
| Total | 48 | 69 | 64 | 181 | ||||||
| Isolates from first-line bacteriostatic treatment | ||||||||||
| Chlortetracycline | 0 | 0 | 0 | 4 | 4 | 1 | 1 | 0 | 1 | 11 |
| Florfenicol | 6 | 6 | 7 | 8 | 7 | 9 | 16 | 8 | 8 | 75 |
| Gamithromycin | 2 | 1 | 0 | 9 | 6 | 2 | 5 | 1 | 2 | 28 |
| Oxytetracycline | 2 | 1 | 1 | 0 | 3 | 1 | 1 | 2 | 1 | 12 |
| Sulfadimethoxine | 2 | 2 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 6 |
| Tetracycline | 0 | 0 | 0 | 5 | 2 | 2 | 0 | 1 | 2 | 12 |
| Tildipirosin | 11 | 3 | 4 | 6 | 5 | 6 | 4 | 8 | 3 | 50 |
| Tilmicosin | 4 | 4 | 4 | 8 | 1 | 5 | 2 | 2 | 0 | 30 |
| Tulathromycin | 29 | 10 | 11 | 33 | 13 | 15 | 24 | 26 | 18 | 179 |
| Tylosin | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
| Total | 113 | 156 | 137 | 406 | ||||||
(MH = M. haemolytica, PM = P. multocida, HS = H. somni).