Effects of delayed steroid implanting on health, performance, and carcass quality in high health risk, auction market-sourced feedlot steers1,2

Munson, Robert D.; Thomson, Daniel U.; Reinhardt, C. D.

doi:10.2527/jas.2012-5095

Cited by 9 publications

(6 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…BRD has been associated with other non-infectious etiologies such as 3-methylindole (Bingham et al , 2000), nutritional interactions and deficiencies (Galyean et al , 1999), production management tools such as hormonal implanting (Munson et al , 2012), sourcing and prior or pre-weaning management (Smith, 1998; Reinhardt et al , 2009; Renter et al , 2013), and genetics (McAllister, 2010). A tremendous amount of work has investigated pathogen interactions related to both clinical and subclinical BRD.…”

mentioning

confidence: 99%

The monster we don't see: subclinical BRD in beef cattle

Griffin

2014

Anim. Health. Res. Rev.

View full text Add to dashboard Cite

Bovine respiratory disease (BRD) is the most expensive disease affecting United States cattle. Recently weaned calves are the focus of prevention and treatment research. Identifying affected cattle early in the course of BRD is difficult. Intervention during the early stages of BRD improves treatment outcomes; however, cattle as prey animals are excellent at hiding signs of disease, especially if the caregiver has not gained their trust. Depression, appetite loss, and changes in respiratory character are the principal signs used to identify BRD. Rectal temperatures from cattle pulled for treatment are a final measure of evaluation. Cattle suffering from subclinical BRD frequently escape identification and treatment. Observations of lungs at packing plants for anterior ventral (AV) lesions frequently document higher BRD incidence rates than observed pre-harvest, suggesting subclinical BRD is common. Data from numerous studies document lower average daily gains (ADG) from cattle with AV lung lesions at packing plants that were not treated for BRD compared with cattle with normal lungs. Scoring lung lesions at the packing plant can be a useful tool for gaining insight into BRD incidence. Data indicate that BRD lowers ADG by 0.2 lbs on average, and lowers the USDA Quality Grade by 50 marbling points.

show abstract

mentioning

confidence: 99%

The monster we don't see: subclinical BRD in beef cattle

Griffin

2014

Anim. Health. Res. Rev.

View full text Add to dashboard Cite

show abstract

“…For instance, Kunkle et al (1980) reported no carryover effects on steer ADG when im planting 36 mg of zeranol during suckling, at weaning, and 84 to 120 d postweaning. Similarly, Munson et al (2012) reported no differences in ADG and G:F during a 187d feedlot period and carcass characteristics at slaughter between auction marketderived steers ad ministered a Revalor XS implant immediately at or 45 d after feedlot arrival. In summary, our results indicate that a 36mg zeranol implant could be administered simultaneously with other calf management procedures, such as wean ing, vaccination, and feedlot entry, without causing or enhancing the inflammatory response or impairing the overall vaccine response to BRDassociated patho gens.…”

Section: Preweaning(d−14to0)andpreconditioning(d 0 To 56) Phasesmentioning

confidence: 91%

“…In the current study, however, serum IBRV titers at the end of the preconditioning phase were increased when implant insertion was delayed by 14 d after wean ing compared to the remaining treatments. Munson et al (2012) reported a tendency toward lower morbidity rates (25% vs. 29%, respectively) for auction market derived steers that received a Revalor XS implant im mediately at or 45 d after feedlot entry. Our results on serum IBRV titers could provide a plausible explana tion for the results observed by Munson et al (2012).…”

Section: Preweaning(d−14to0)andpreconditioning(d 0 To 56) Phasesmentioning

confidence: 96%

“…Munson et al (2012) reported a tendency toward lower morbidity rates (25% vs. 29%, respectively) for auction market derived steers that received a Revalor XS implant im mediately at or 45 d after feedlot entry. Our results on serum IBRV titers could provide a plausible explana tion for the results observed by Munson et al (2012). However, serum IBRV titers were substantially lower than the values observed for serum BVDV1a and 2 titers.…”

Section: Preweaning(d−14to0)andpreconditioning(d 0 To 56) Phasesmentioning

confidence: 96%

See 1 more Smart Citation

Effects of timing of anabolic implant insertion on growth and immunity of recently weaned beef steers1

Moriel

Artioli

Piccolo

et al. 2016

Journal of Animal Science

View full text Add to dashboard Cite

We evaluated the effects of timing of estrogenic implant insertion, relative to weaning, on growth performance and measurements of innate and humoral immunity of beef calves. On d -14, Angus × Simmental crossbred steers ( = 48; BW = 217 ± 5 kg; age = 191 ± 3 d) were stratified by BW, age, and cow parity and randomly assigned to receive no implant (NOIP) or 36 mg of zeranol on d -14, 0, or 14, relative to weaning (IP-14, IP0, and IP+14, respectively; 12 steers/treatment). From d -14 to 0, cow-calf pairs remained on a single, tall-fescue pasture with no access to concentrate supplementation. Steers were weaned on d 0, stratified by treatment and BW, and then allocated into 1 of 16 drylot pens to receive daily free-choice access to a corn silage-based diet during the preconditioning phase (d 0 to 56). Steers were vaccinated against infectious bovine rhinotracheitis (IBRV), bovine viral diarrhea virus (BVDV), and on d -27 and 0. From d 56 to 252 (postpreconditioning phase), steers remained in their respective feedlot pens and were provided free-choice access to corn silage-based growing (d 56 to 167) and finishing total mixed rations (d 168 to 252). Body weight on d 0 did not differ among treatments ( ≥ 0.29) but was greater for IP-14 and IP0 than NOIP and IP+14 steers on d 14, 42, and 56 ( ≤ 0.05). Treatment effects were not detected for G:F and DMI from d 0 to 56 ( ≥ 0.34), but ADG from d -14 to 56 was greater for IP-14 compared to NOIP ( ≤ 0.05) and intermediate for IP0 and IP+14 steers. Plasma IGF-1 concentrations were greater for IP-14 than NOIP ( ≤ 0.05) and intermediate for IP0 and IP+14 steers on d -7, 0, 14, and 21. Plasma concentrations of cortisol and haptoglobin and serum titers against BVDV types 1a and 2 did not differ among treatments from d 0 to 56 ( ≥ 0.37). However, serum IBRV titers were greater for IP+14 than NOIP, IP-14, and IP0 steers ( ≤ 0.02). On d 252, BW was greater for IP-14 and IP0 than NOIP steers ( ≤ 0.05) and intermediate for IP+14 steers, but ADG and G:F from d 57 to 252 and carcass characteristics at slaughter did not differ among treatments ( ≥ 0.16). Thus, the 36-mg zeranol implant did not elicit an inflammatory response or affect the overall vaccine response of steers (except for IBRV titers). However, growth of steers during a 56-d preconditioning period was enhanced by administering 36-mg zeranol implant 14 d before weaning, without affecting subsequent postpreconditioning growth and carcass characteristics at slaughter.

show abstract

“…Although ruminants may have a greater capacity to store digesta because of their larger digestive tracts, this weight loss and decrease in body condition may be comparable to the hypermetabolic state that develops in non-ruminants [3]. Munson et al [4] reported that delaying implant administration in high-risk calves did not alter feedlot performance or the risk of respiratory disease, suggesting that stress brought on by the transition to the feedlot did not diminish the anabolic signals from implanting early in the finishing phase.…”

Section: Introductionmentioning

confidence: 99%

Restricted nutrient intake does not alter serum-mediated measures of implant response in cell culture

Reinhardt

Lee

Thomson

et al. 2013

J Animal Sci Biotechnol

View full text Add to dashboard Cite

BackgroundDuring nutritional stress, reduced intake may reduce the efficacy of anabolic implants. This study was conducted to evaluate basic cellular responses to a growth promotant implant at two intake levels.MethodsSixteen crossbred steers (293 ± 19.3 kg) were used to evaluate the impact of anabolic implants in either an adequate or a restricted nutritional state. Steers were trained to individual Calan gates, and then randomly assigned to 1 of 4 treatments in a 2 × 2 factorial arrangement. Treatments consisted of: presence or absence of an anabolic growth implant (Revalor-XS, 200 mg TBA and 40 mg estradiol; IMPLANT or CONTROL) and a moderate energy, pelleted, starting cattle diet fed at either 2.0 × or 1.0 × maintenance energy (NEM) requirements (HIGH or LOW). Serum (d 0, 14, and 28) was used for application to bovine muscle satellite cells. After treatment with the serum (20% of total media) from the trial cattle, the satellite cells were incubated for 72 h. Protein abundance of myosin heavy chain (MHC), phosphorylated extracellular signal-related kinase (phospho-ERK), and phosphorylated mammalian target of rapamycin (phospho-mTOR) were analyzed to determine the effects of implant, intake, and their interaction (applied via the serum).ResultsIntake had no effect on MHC (P = 0.85) but IMPLANT increased (P < 0.01) MHC abundance vs. CONTROL. Implant status, intake status, and the interaction had no effect on the abundance of phospho-ERK (P ≥ 0.23). Implanting increased phospho-mTOR (P < 0.01) but there was no effect (P ≥ 0.51) of intake or intake × implant.ConclusionsThe nearly complete lack of interaction between implant and nutritional status indicates that the signaling molecules measured herein respond to implants and nutritional status independently. Furthermore, results suggest that the muscle hypertrophic effects of anabolic implants may not be mediated by circulating IGF-1.

show abstract

Effects of delayed steroid implanting on health, performance, and carcass quality in high health risk, auction market-sourced feedlot steers1,2

Cited by 9 publications

References 30 publications

The monster we don't see: subclinical BRD in beef cattle

The monster we don't see: subclinical BRD in beef cattle

Effects of timing of anabolic implant insertion on growth and immunity of recently weaned beef steers1

Restricted nutrient intake does not alter serum-mediated measures of implant response in cell culture

Contact Info

Product

Resources

About