Evaluation of economic and performance outcomes associated with the number of treatments after an initial diagnosis of bovine respiratory disease in commercial feeder cattle

2013 ◽  
Vol 74 (2) ◽  
pp. 300-309 ◽  
Author(s):  
Natalia Cernicchiaro ◽  
Brad J. White ◽  
David G. Renter ◽  
Abram H. Babcock
Keyword(s):  
Respiratory Disease ◽  
Bovine Respiratory Disease ◽  
Performance Outcomes ◽  
Initial Diagnosis ◽  
Feeder Cattle ◽  
And Performance

scholarly journals Net return distributions when metaphylaxis is used to control bovine respiratory disease in high health-risk cattle

2020 ◽  
Vol 4 (2) ◽  
pp. 1091-1102
Author(s):  
Elliott J Dennis ◽  
Ted C Schroeder ◽  
David G Renter
Keyword(s):  
Health Risk ◽  
Respiratory Disease ◽  
Bovine Respiratory Disease ◽  
Performance Outcomes ◽  
Feedlot Cattle ◽  
Net Return ◽  
Lower Tier ◽  
Net Returns ◽  
Return Distributions ◽  
And Performance

Abstract This study’s objective was to estimate net returns and return risk for antimicrobial metaphylaxis options to manage bovine respiratory disease (BRD) in high health-risk feedlot cattle. The effectiveness of antimicrobials for metaphylaxis varies by cattle population. How differing antimicrobial effectiveness translates to net return profitability for heterogeneous cattle populations is less understood. Net returns and return risk were assessed using a net return simulation model adapted to allow for heterogeneity in high health-risk cattle placement characteristics and antimicrobial choice to control BRD. The net return model incorporated how antimicrobials modify BRD health and performance outcomes. Health and performance outcomes were calibrated from published literature and proprietary feedlot data. Proprietary data came from 10 Midwestern feedlots representing nearly 6 million animals and 50,000 cohorts. Twelve placement-by-metaphylaxis decision combinations were assessed: high health-risk steer placement demographics were 600 or 800 lb steers placed in Winter (Oct–Mar) or Summer (Apr–Sept) managed with one of three different health programs: “no metaphylaxis,” “Upper Tier” antimicrobial, or “Lower Tier” antimicrobial. Net return distributions were compared between “no metaphylaxis” and a specific antimicrobial tier within specific cattle populations. We found the expected incremental net return of administering an “Upper Tier” (“Lower Tier”) antimicrobial for metaphylaxis compared to “no metaphylaxis” for high health-risk steers was $122.55 per head ($65.72) for 600 lb and $148.65 per head ($79.65) for 800 lb winter placements. The incremental expected net return and risk mitigated by metaphylaxis varied by placement weight, season, and antimicrobial choice. The probability net returns would decline by at least $50 per head was significantly reduced (from approximately 4% to 40%) when any antimicrobial was used on high health-risk steers. Both tiers of antimicrobials used for metaphylaxis increased expected net returns and decreased net return variability relative to no metaphylaxis. Thus, feedlots were more certain and realize a greater profit on high health-risk pens of steers when metaphylaxis was used. This occurred because the reduction in cattle health and performance outcomes using any antimicrobial was sufficiently large to cover added initial and subsequent antimicrobial costs. Results aid in assessing metaphylaxis strategies in high health-risk cattle.

86 Effect of Post-metaphylactic Interval on Health and Performance of Steers Administered Tildipirosin for the Control of Bovine Respiratory Disease

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 5-5
Author(s):  
Marshall N Streeter ◽  
Josh Szasz ◽  
Tony C Bryant
Keyword(s):  
Body Weight ◽  
Respiratory Disease ◽  
Bovine Respiratory Disease ◽  
Beef Steers ◽  
Linear Quadratic ◽  
Moderate Risk ◽  
Final Body Weight ◽  
Treatment Data ◽  
Carcass Performance ◽  
And Performance

Abstract Crossbred beef steers (n = 8160; 294 + 10.4 kg) were used in a randomized complete block designed study to determine the effects of post-metaphylactic interval (PMI) on health, live and carcass performance. Steers were administered tildipirosin for the control of bovine respiratory disease (BRD) before being randomly allocated to PMI treatments (4-, 7-, 10-, or 13-day PMI). Treatments were replicated in forty - 204 head pens with each treatment represented within 10 arrival blocks. Blocks ranged from 4 to 15 unique sources of cattle representing five states (AR, FL, GA, LA, TX). Steers were observed daily (217 + 14 d) by trained pen riders with steers suffering from BRD receiving a common antibiotic therapy across PMI treatment. Data were evaluated using linear, quadratic and cubic contrasts. First pull BRD morbidity decreased linearly (P < 0.01) and tended to decrease quadratically (P = 0.08) as PMI increased with the greatest BRD morbidity at 7 days (12.9%) and the least at 13 days (9.5%). First pull BRD relapses tended to decrease linearly (P = 0.10) with increasing PMI. Total first pull morbidity, for all causes, decreased quadratically (P = 0.02) as PMI increased with the greatest morbidly occurring with a 7-day PMI (15.8%) and the least with a 13-day PMI (11.5%). Mortality caused by BRD (0.73%; P > 0.70) and all causes (1.41%; P > 0.20) or chronicity (1.60%; P > 0.15), resulting from failure to respond to therapy, were not affected by PMI. Final body weight, ADG, DMI, Gain:Feed, and HCW were not affected (P > 0.20) by PMI. Total and BRD morbidity can be reduced by increasing PMI up to 13 days in cattle at moderate risk of developing BRD (15% morbidity, 1% mortality, 1% chronicity) without adversely affecting mortality, chronicity or live and carcass performance.

scholarly journals Association between antimicrobial drug class selection for treatment and retreatment of bovine respiratory disease and health, performance, and carcass quality outcomes in feedlot cattle

2020 ◽  
Vol 98 (4) ◽  
Author(s):  
Johann F Coetzee ◽  
Natalia Cernicchiaro ◽  
Pritam K Sidhu ◽  
Michael D Kleinhenz
Keyword(s):  
Respiratory Disease ◽  
Bovine Respiratory Disease ◽  
Average Daily Gain ◽  
Performance Outcomes ◽  
Resistant Bacteria ◽  
Carcass Quality ◽  
Diagnostic Laboratory ◽  
Quality Outcomes ◽  
Health Performance ◽  
Antimicrobial Treatments

Abstract Treatment and control of bovine respiratory disease (BRD) is predicated on the use of two categories of antimicrobials, namely bacteriostatic drugs that inhibit bacterial growth and replication (STATIC), and bactericidal drugs that kill bacteria in in vitro culture systems (CIDAL). Recently, we reported that initial BRD treatment with a STATIC antimicrobial followed by retreatment with a CIDAL antimicrobial was associated with a higher frequency of multidrug-resistant bacteria isolated from field cases of BRD submitted to a veterinary diagnostic laboratory. The present study was conducted to test the hypothesis that calves administered the same class of antimicrobial for first and second BRD treatment (i.e., CIDAL-CIDAL or STATIC-STATIC) would have improved health and performance outcomes at the feedlot compared to calves that received a different antimicrobial class for retreatment (i.e., STATIC-CIDAL or CIDAL-STATIC). The association between antimicrobial treatments and health, performance, and carcass quality outcomes were determined by a retrospective analysis of 4,252 BRD treatment records from a commercial feedlot operation collected from 2001 to 2005. Data were compared using generalized linear mixed statistical models that included gender, season, and arrival weight as covariates. The mean (±SE) probability of BRD cases identified as requiring four or more treatments compared to three treatments was greater in calves that received STATIC-CIDAL (73.58 ± 2.38%) or STATIC-STATIC (71.32 ± 2.52%) first and second antimicrobial treatments compared to calves receiving CIDAL-CIDAL (50.35 ± 3.46%) first and second treatments (P < 0.001). Calves receiving CIDAL-CIDAL first and second treatments also had an increased average daily gain (1.11 ± 0.03 kg/d) compared to calves receiving STATIC-CIDAL (0.95 ± 0.03 kg/d) and STATIC-STATIC (0.84 ± 0.02 kg/d) treatments (P < 0.001). Furthermore, CIDAL-CIDAL-treated calves had a higher probability of a choice quality grade at slaughter (36.44 ± 4.80%) compared to STATIC-CIDAL calves (28.09 ± 3.88%) (P = 0.037). There was no effect of antimicrobial treatment combination on BRD mortality (P = 0.855) or yield grade (P = 0.240) outcomes. These observations suggest that consideration should be given to antimicrobial pharmacodynamics when selecting drugs for retreatment of BRD. These findings have implications for developing BRD treatment protocols that address both post-treatment production and antimicrobial stewardship concerns.

Mycoplasma bovis and bovine respiratory disease: A risk factor study in Australian feeder cattle

2018 ◽  
Vol 157 ◽  
pp. 152-161 ◽  
Author(s):  
M.L. Schibrowski ◽  
J.S. Gibson ◽  
K.E. Hay ◽  
T.J. Mahony ◽  
T.S. Barnes
Keyword(s):  
Risk Factor ◽  
Respiratory Disease ◽  
Bovine Respiratory Disease ◽  
Mycoplasma Bovis ◽  
Feeder Cattle ◽  
Risk Factor Study ◽  
Factor Study

The school competency contingency of worth as a mediator between performance-oriented achievement goals and performance outcomes

2003 ◽  
Author(s):  
David Buck ◽  
Noelle Liwski ◽  
Connie Wolfe ◽  
Maxx Somers ◽  
Kati Knight ◽  
...  
Keyword(s):  
Achievement Goals ◽  
Performance Outcomes ◽  
And Performance
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