TY - JOUR
T1 - Effects of Respiratory Disease Risk and a Bolus Injection of Trace Minerals at Receiving on Growing and Finishing Performance by Beef Steers
AU - Clark, J. H.
AU - Olson, K. C.
AU - Schmidt, T. B.
AU - Larson, R. L.
AU - Ellersieck, M. R.
AU - Alkire, D. O.
AU - Meyer, D. L.
AU - Rentfrow, G. K.
AU - Carr, C. C.
N1 - Publisher Copyright:
© 2006 American Registry of Professional Animal Scientists.
PY - 2006/6/1
Y1 - 2006/6/1
N2 - Crossbred beef steers (n = 189; initial BW = 266 ± 27 kg) at low (LO) or high (HI) risk for respiratory disease were assigned randomly to receive a 5-mL s.c. trace mineral (TM) injection containing 75 mg of Cu, 25 mg of Se, 50 mg of Mn, and 200 mg of Zn, or a 5-mL s.c. injection of physiological saline (SA) upon arrival at a feedlot. Steers designated as LO were vaccinated against common diseases, treated for parasites, and weaned (45 d) before the study commenced. Steers designated as HI were vaccinated, treated for parasites, and weaned upon arrival at the feedlot. All steers were fed the same receiving diet ad libitum for a period of 28 d and monitored twice daily for symptoms of respiratory disease. Respiratory disease risk level did not affect receiving ADG (P = 0.78); however, HI steers had greater (P <0.01)incidence of undifferentiated fever and greater (P < 0.05) treatment costs during the receiving period. Incidence of undifferentiated fever and treatment costs were similar (P = 0.86) between TM and SA; however, SA-treated cattle had greater ADG (P = 0.02) than did TM-treated cattle during the receiving period. Steers were transitioned to a common finishing diet at the conclusion of the receiving period and fed for an average of 196 d before harvest. Finishing ADG and DMI were similar (P > 0.20) for TM- or SAtreated cattle; however, a single treatment with TM at receiving was associated with increased (P = 0.04) finishing gain:feed. Finishing ADG and DMI by LO steers were greater (P < 0.01) than that of HI steers; conversely, HI steers tended to have greater (P = 0.09) finishing gain:feed than LO steers. Hot carcass weight, kidney, pelvic, and heart fat, and incidence of lung lesions were similar (P > 0.23) between HI and LO steers. Liver abscess incidence among LO steers was less (P < 0.01) than that of HI steers. Risk level for respiratory disease had pronounced effects on morbidity and treatment costs during receiving and on ADG and DMI during finishing.
AB - Crossbred beef steers (n = 189; initial BW = 266 ± 27 kg) at low (LO) or high (HI) risk for respiratory disease were assigned randomly to receive a 5-mL s.c. trace mineral (TM) injection containing 75 mg of Cu, 25 mg of Se, 50 mg of Mn, and 200 mg of Zn, or a 5-mL s.c. injection of physiological saline (SA) upon arrival at a feedlot. Steers designated as LO were vaccinated against common diseases, treated for parasites, and weaned (45 d) before the study commenced. Steers designated as HI were vaccinated, treated for parasites, and weaned upon arrival at the feedlot. All steers were fed the same receiving diet ad libitum for a period of 28 d and monitored twice daily for symptoms of respiratory disease. Respiratory disease risk level did not affect receiving ADG (P = 0.78); however, HI steers had greater (P <0.01)incidence of undifferentiated fever and greater (P < 0.05) treatment costs during the receiving period. Incidence of undifferentiated fever and treatment costs were similar (P = 0.86) between TM and SA; however, SA-treated cattle had greater ADG (P = 0.02) than did TM-treated cattle during the receiving period. Steers were transitioned to a common finishing diet at the conclusion of the receiving period and fed for an average of 196 d before harvest. Finishing ADG and DMI were similar (P > 0.20) for TM- or SAtreated cattle; however, a single treatment with TM at receiving was associated with increased (P = 0.04) finishing gain:feed. Finishing ADG and DMI by LO steers were greater (P < 0.01) than that of HI steers; conversely, HI steers tended to have greater (P = 0.09) finishing gain:feed than LO steers. Hot carcass weight, kidney, pelvic, and heart fat, and incidence of lung lesions were similar (P > 0.23) between HI and LO steers. Liver abscess incidence among LO steers was less (P < 0.01) than that of HI steers. Risk level for respiratory disease had pronounced effects on morbidity and treatment costs during receiving and on ADG and DMI during finishing.
KW - Efficiency
KW - Respiratory disease
KW - Steer
KW - Trace mineral
UR - http://www.scopus.com/inward/record.url?scp=84892669582&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84892669582&partnerID=8YFLogxK
U2 - 10.15232/S1080-7446(15)31100-1
DO - 10.15232/S1080-7446(15)31100-1
M3 - Article
AN - SCOPUS:84892669582
SN - 1080-7446
VL - 22
SP - 245
EP - 251
JO - Professional Animal Scientist
JF - Professional Animal Scientist
IS - 3
ER -
