Table 1.
Antimicrobial drugs used in this study population
| Antimicrobial Drug and Dosage | Primary Reason for Use | Class |
|---|---|---|
| Parenteral | ||
| Ceftiofur sodium 1 mg/kg BW | BRD Treatment | Beta lactam |
| Ceftiofur crystalline free acid 6.6 mg/kg BW | BRD Treatment | Beta lactam |
| Ceftiofur hydrochloride 1.1 mg/kg BW | BRD Treatment | Beta lactam |
| Enrofloxacin 7.7 mg/kg BW | Relapse BRD Treatment | Quinolone |
| Florfenicol 40 mg/kg BW | BRD Treatment | Phenicol |
| Florfenicol 40 mg/kg BW & Flunixin meglumine 2.2 mg/kg BW | BRD Treatment | Phenicol |
| Oxytetracycline | ||
| 10 mg/kg BW | BRD Prevention/Treatment | Tetracycline |
| 20 mg/kg BW | BRD Prevention/Treatment | Tetracycline |
| 30 mg/kg BW | BRD Prevention/Treatment | Tetracycline |
| Tilmicosin 10 mg/kg BW | BRD Prevention/Treatment | Macrolide |
| Trimethoprim and sulfadoxine 16 mg/kg BW | BRD Treatment | Sulfonamide |
| Tulathromycin 2.5 mg/kg BW | BRD Prevention/Treatment | Macrolide |
| Tylosin tartrate 29 mg | Implant Site Abscess Prevention | Macrolide |
| In‐Feed | ||
| Chlortetracycline @ | ||
| 35 mg/kg diet dry matter | Liver Abscess Prevention | Tetracycline |
| 1 g/head/day | Histophilosis Prevention/Treatment | Tetracycline |
| 3 g/head/day | Histophilosis Prevention/Treatment | Tetracycline |
| 6 g/head/day | Histophilosis Prevention/Treatment | Tetracycline |
| Tylosin phosphate @ 11 mg/kg diet dry matter | Liver Abscess Prevention | Macrolide |