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. 2015 Jul;93(7):3661–3674. doi: 10.2527/jas.2015-9023

Table 7.

Effects of ancillary therapies used in combination with an antimicrobial on subsequent finishing performance and efficiency of crossbred steers

Variable Experimental ancillary treatment1 Pooled SEM Overall P-value2
NOAC NSAID VACC VITC
Days on feed,3 d 181 182 190 182 2.98 0.11
BW,4 kg
    Initial 294 289 287 297 5.98 0.60
    d 45 375 368 365 374 6.80 0.62
    d 91 441 432 429 432 7.61 0.66
    d 138 503 498 495 500 8.65 0.92
    Final 562 561 565 565 9.12 0.98
ADG,5 kg
    Initial to d 45 1.81 1.75 1.74 1.72 0.06 0.70
    d 46 to d 91 1.43 1.41 1.40 1.26 0.07 0.24
    d 92 to d 138 1.33 1.40 1.40 1.44 0.08 0.43
    d 139 to final 1.44 1.52 1.39 1.55 0.08 0.44
    Initial to final 1.49 1.50 1.47 1.48 0.05 0.98
DMI,6 kg
    Initial to d 45 8.57 8.65 8.73 8.58 0.23 0.96
    d 46 to d 91 9.71 9.75 10.1 10.1 0.33 0.73
    d 92 to d 138 10.1 9.78 10.2 10.5 0.31 0.48
    d 139 to final 10.2 9.87 9.91 10.4 0.30 0.60
    Initial to final 9.63 9.49 9.74 9.82 0.23 0.76
G:F7
    Initial to d 45 0.212 0.203 0.198 0.197 0.01 0.26
    d 46 to d 91 0.149 0.145 0.139 0.130 0.01 0.31
    d 92 to d 138 0.132 0.145 0.140 0.144 0.01 0.49
    d 139 to final 0.140 0.155 0.140 0.151 0.01 0.54
    Initial to final 0.155 0.159 0.151 0.154 <0.01 0.61

1Experimental ancillary therapy treatments administered at each antimicrobial treatment for bovine respiratory disease: NOAC = antimicrobial only, no ancillary therapy; NSAID = intravenous flunixin meglumine injection; VACC = revaccination with an intranasal viral vaccine; VITC = intramuscular vitamin C injection.

2 P-values are included for the overall F test.

3Average of days on feed for all pens within an experimental treatment.

4Treatment BW was the BW in kilograms with a calculated 4% shrink.

5Treatment ADG was calculated from the shrunk (4%) BW in kilograms and days on feed between the time periods.

6Treatment DMI was calculated by taking DMI in kilograms for a pen for the period shown divided by the actual number of head days within each pen.

7Treatment G:F was calculated by taking the pen ADG in kilograms divided by the pen average DMI in kilograms for the time periods.