Table 9.
Number and percentage, with 95% confidence interval (CI), of cattle (placed 2008-2012) exposed to individually dosed AMD for different indications by placement cohort (PC)a.
| Placement cohort | |||||
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | Total | |
| (n = 717,176) | (n = 670,066) | (n = 648,916) | (n = 578,924) | (n = 2,615,082) | |
| CATTLE EXPOSED, NO. (%OF PC; 95% CI) | |||||
| Metaphylaxisb or Treatmentc for BRDd | 528,117 (73.6; 73.54–73.74) | 492,271 (73.5; 73.36–73.57) | 452,987 (69.8; 69.70–69.92) | 408,678 (70.6; 70.48–70. 71) | 1,882,053 (72.0;71.91–72.02) |
| Metaphylaxis for BRD | 513,897 (71.7; 71.55–71.76) | 481,549 (71.9; 71.76–71.97) | 440,938 (67.9; 67.84–68.06) | 398,082 (68.8; 68.64–68.88) | 1,834,466 (70.1;70.09–70.20) |
| Treatment for BRD | 48,220 (6.7; 6.67–6.78) | 39,278 (5.9; 5.81–5.92) | 34,652 (5.3; 5.29–5.39) | 31,099 (5.4; 5.31–5.43) | 153,249 (5.9; 5.83–5.89) |
| Treatment for Reason other than BRD | 33,359 (4.7; 4.60–4.70) | 26,030 (3.9; 3.84–3.93) | 24,261 (3.7; 3.69–3.78) | 28,722 (5.0; 4.91–5.02) | 112,372 (4.3; 4.27–4.32) |
The number of exposed cattle is presented in the left side of the cell. On the right side of the cell, the estimate of the percentage of cattle in the placement cohort this number represents is presented with the 95% CI to the right after a semi-colon.
Placement cohort comprised of cattle placed in the feedlot between l November and 31 October of consecutive years.
Metaphylaxis is the group administration of an antimicrobial to a population at risk for disease before overt clinical disease is apparent in the entire group.
Treatment is administration of an antimicrobial to an individual animal diagnosed with clinical disease.
Bovine Respiratory Disease.