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

Table 8.

Effects of ancillary therapies used in combination with an antimicrobial on ultrasound estimates, lung scores, and carcass characteristics of crossbred steers

Variable Experimental ancillary treatment1 Pooled SEM Overall P-value2
NOAC NSAID VACC VITC
Ultrasound estimates3
    d 91 REA, cm2 80.5 79.4 77.0 80.6 1.80 0.44
    d 91 12th-rib fat, cm 0.81 0.77 0.81 0.77 0.04 0.73
    d 91 IMF 4.21 4.17 4.47 4.31 0.16 0.53
    d 138 REA, cm2 87.7 87.6 83.5 87.2 1.77 0.26
    d 138 12th-rib fat, cm 0.92 0.91 0.93 0.90 0.05 0.98
    d 138 IMF 4.45 4.20 4.49 4.33 0.17 0.55
Lung scores4
    Consolidation5 0.60 1.03 0.92 0.79 0.20 0.33
    Adhesion6 0.80 0.70 1.00 0.86 0.16 0.58
HCW, kg 363 360 364 363 6.69 0.97
Dressing percentage 64.5 64.2 64.5 64.3 0.53 0.97
REA, cm2 92.4 90.9 91.0 91.6 2.04 0.94
12th-rib fat, cm 1.33 1.26 1.42 1.32 0.09 0.67
KPH fat, % 2.00 2.00 2.06 2.11 0.07 0.58
Marbling score7 407 415 436 440 20.6 0.29
Prime and choice,8 % 43.0 56.3 61.8 53.6 12.6 0.51
Yield grade 2.67 2.63 2.84 2.72 0.17 0.81
Liver score9 0.54 0.36 0.35 0.29 0.25 0.87

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.

3Ultrasound estimates of rib eye area (REA), 12th-rib fat thickness, and intramuscular fat (IMF) were taken on d 91 and 138 by Chad Gordon of Ultrasound Technologies, Fletcher, OK.

4Lung scores were obtained by trained personnel from West Texas A&M University.

5Lung consolidation: 0 = clinically normal, healthy lung with <5% consolidation of lung tissue; 1 = ±5% consolidation of lung tissue or mycoplasma-like lesion; 2 = >5% but <50% consolidation of lung tissue, missing lung, or mycoplasma-like lesion; 3 = >50% consolidation of lung tissue, missing lung, or mycoplasma-like lesion.

6Lung adhesion: 0 = clinically normal, healthy lung; 1 = minor threadlike fibrous adhesion; 2 = extensive fibrous adhesion.

7Marbling scores: 400 = Small00, 500 = Modest00.

8Pecentage of calves with prime or choice carcasses within each pen.

9Liver Score: 0 = no abscesses, 1 = A−, 2 = A, 3 = A+, 4 = telangiectasis, 5 = distoma (fluke damage), and 6 = fecal contamination.