Table 8.
Percent (number) of herdsa that reported using certain antimicrobial drugs at least once in beef cows or calves on the farm during the period of January 1 to June 30, 2002.
| Treatment | Used at least once, percent (number) | No use, percent (number) |
|---|---|---|
| Oxytetracycline/tetracycline | 61 (123) | 39 (80) |
| Sulphonamide | 59 (120) | 41 (83) |
| Florfenicol | 43 (88) | 57 (115) |
| Penicillin | 38 (77) | 62 (126) |
| Tilmicosin | 27 (54) | 73 (149) |
| Sulbactam-ampicillin injectable | 9.9 (20) | 90 (183) |
| Ceftiofur | 8.9 (18) | 91 (185) |
| Enrofloxacin | 0.5 (1) | 100 (202) |
a
Total number of herds enrolled, N = 203.