Table 5.
Use category | Antimicrobial class | Reg/AY | mg/kg-LW | # Feedyards | |||
---|---|---|---|---|---|---|---|
2018 | 2019 | 2018 | 2019 | 2018 | 2019 | ||
in-feed | Macrolide | 2.02 | 1.86 | 20.90 | 21.29 | 16 | 15 |
Tetracycline | 0.12 | 0.10 | 4.42 | 4.04 | 9 | 6 | |
Total in-feed | 2.14 | 1.96 | 25.32 | 25.33 | – | – | |
Control of BRD | Cephalosporin | 0.11 | 0.07 | 0.19 | 0.10 | 7 | 7 |
Fluoroquinolone | 0.0001 | 0.001 | 0.0003 | 0.003 | 1 | 2 | |
Macrolide | 0.15 | 0.18 | 0.12 | 0.14 | 12 | 15 | |
Penicillin | 0.02 | 0.01 | 0.08 | 0.04 | 3 | 3 | |
Phenicol | 0.0004 | 0.00 | 0.006 | 0.00 | 2 | 0 | |
Sulfonamide* | 0.0007 | <0.0000 | 0.037 | 0.002 | 1 | 1 | |
Tetracycline | 0.05 | 0.09 | 0.29 | 0.56 | 6 | 8 | |
Total control | 0.34 | 0.35 | 0.73 | 0.84 | – | – | |
Individual animal treatment | Aminoglycoside | 0.00 | 0.00 | 0.02 | 0.02 | 1 | 1 |
Cephalosporin | 0.02 | 0.03 | 0.04 | 0.04 | 17 | 18 | |
Fluoroquinolone | 0.05 | 0.05 | 0.12 | 0.12 | 17 | 16 | |
Macrolide | 0.09 | 0.07 | 0.08 | 0.07 | 20 | 20 | |
Penicillin | 0.004 | 0.01 | 0.03 | 0.05 | 5 | 6 | |
Phenicol | 0.05 | 0.06 | 0.50 | 0.58 | 19 | 19 | |
Sulfonamide | 0.01 | 0.01 | 0.82 | 1.14 | 8 | 6 | |
Tetracycline | 0.04 | 0.03 | 0.23 | 0.20 | 16 | 17 | |
Total Individual | 0.26 | 0.26 | 1.84 | 2.23 | – | – | |
All uses | Overall total | 2.74 | 2.56 | 27.89 | 28.40 | – | – |
Decimal places were increased up to 4 places to display a non-zero value where possible. *Six regimens were reported for sulfonamides for control of BRD in 2019.