Influence of breed, heterozygosity, and disease incidence on estimates of variance components of respiratory disease in preweaned beef calves

Snowder, G. D.; Vleck, L.D. Van; Cundiff, L. V.; Bennett, G. L.

doi:10.2527/2005.8361247x

Cited by 87 publications

(114 citation statements)

References 25 publications

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“…A study by Sanderson and Dargatz (2000) estimated a mean morbidity of 5.8% before weaning on US beef herds. Pre-weaning calf diarrhea (PCD) may affect between 2.4% and 36% of beef calves, and bovine respiratory disease (BRD) may affect between 3% and 11% (Acres et al, 1977;Snowder et al, 2005;Hanzlicek et al, 2013;Waldner et al, 2013). Morbidity in calves has significant impacts on average daily gain and production efficiencies of the animal (Smith, 1998).…”

Section: Introductionmentioning

confidence: 99%

Calf management practices and associations with herd-level morbidity and mortality on beef cow-calf operations

Murray

Fick

Pajor

et al. 2016

Animal

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The objective of this study was to investigate calf management practices on beef cow-calf operations and determine associations with herd-level morbidity and mortality of pre-weaned calves. A 40-question survey about management practices, morbidity and mortality was administered to cow-calf producers by distributing paper surveys and by circulating an online link through various media. A total of 267 producers completed the survey. Data were analyzed with descriptive statistics and multivariable linear regression models. Average herd-level treatment risk for pre-weaning calf diarrhea (PCD) and bovine respiratory disease (BRD) were 4.9% and 3.0%, respectively. Average herd-level mortality within the first 24 h of life (stillbirth), from 1 to 7 days and 7 days to weaning were 2.3%, 1.1%, and 1.4%, respectively. Operations that never intervened at parturition had 4.7% higher PCD than those that occasionally did. On operations using small elastrator bands for castration, PCD was 1.9% higher than those using other methods. For every increase of 100 cows in herd size, BRD decreased by 1.1%. The association between BRD and PCD varied by when calving season began. Operations that used off-farm, frozen colostrum had a 1.1% increase in stillbirths. Operations that verified a calf had suckled had 0.7% lower mortality from 1 to 7 days of age. Those that intervened when colostrum was abnormal or that used small elastrator bands for castration had 1.9% and 1.4% higher mortality during the 1 st week of life, respectively, compared with other operations. Mortality from 7 days to weaning was lower by 0.7% when calving season started in April compared with January or February and was higher by 1.0% for each additional week of calving season. Operations that intervened with colostrum consumption for assisted calvings had lower mortality from 7 days to weaning by 0.8% compared with those that did not. For every 1.0% increase in BRD, mortality from 7 days to weaning increased by 1.0%. Stillbirths and mortality from 7 days to weaning decreased non-linearly with herd size. Factors related to calving season, herd size, interventions at calving, colostrum management and castration impacted herd-level morbidity and mortality. However, effect size was generally small and causation cannot be determined with a cross-sectional study design. This study identifies several common health management practices associated with calfhood morbidity and mortality that should be further investigated to establish evidence-based management strategies to improve the health and survival of beef calves.

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Section: Introductionmentioning

confidence: 99%

Calf management practices and associations with herd-level morbidity and mortality on beef cow-calf operations

Murray

Fick

Pajor

et al. 2016

Animal

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“…Heritability estimates for resistance to BRD have previously been reported in preweaned calves by Muggli-Cockett et al (1992; h 2 = 0.10) and Snowder et al (2005; h 2 = 0.00 to 0.26). In feedlot cattle, Snowder et al (2006) estimated heritability of BRD resistance between 0.04 and 0.08, with an estimate of 0.18 when the heritability was calculated on the continuous scale underlying the binomial distribution.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of fixed sources of variation and estimation of genetic parameters for incidence of bovine respiratory disease in preweaned calves and feedlot cattle12

Schneider

Tait

Ruble

et al. 2010

Journal of Animal Science

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The primary objective of this study was to estimate variance components and heritability of bovine respiratory disease (BRD) incidence in beef calves before weaning and during the finishing phase. The second objective was to investigate the impact of BRD incidence and treatment frequency on performance and carcass traits. Bovine respiratory disease is the biggest and most costly health challenge facing the cattle industry. The 2 populations used consisted of 1,519 preweaned calves and 3,277 head of feedlot cattle. The incidence rate of BRD in preweaned calves was 11.39%, and among treated cattle, 82.1% were treated once, 13.9% were treated twice, and 4.0% were treated 3 times or more. The incidence of BRD (P = 0.35) and the number of treatments (P = 0.77) had no significant effect on weaning BW. Heritability estimates of the entire preweaned population for BRD resistance and number of treatments were 0.11 ± 0.06 and 0.08 ± 0.05, respectively. The genetic correlation estimates for BRD incidence with weaning BW and birth BW were low (−0.02 ± 0.32 and 0.07 ± 0.27, respectively). The same estimate for the number of BRD treatments with weaning BW and birth BW was 0.25 ± 0.35 and 0.30 ± 0.27, respectively. The observed BRD incidence rate for feedlot cattle was observed at 9.43%. Incidence of BRD significantly (P < 0.01) decreased overall and acclimation ADG by 0.06 ± 0.01 kg/d and 0.28 ± 0.03 kg/d, respectively. Carcass traits were also significantly (P < 0.05) affected by BRD incidence; untreated cattle had a 9.1 ± 1.7-kg heavier HCW. Results were similar in the analysis of treatment frequency. The heritability estimate of BRD incidence and the number of treatments were 0.07 ± 0.04 and 0.02 ± 0.03, respectively. Estimates of genetic correlations of BRD incidence with production traits were −0.63 ± 0.22 for acclimation ADG, −0.04 ± 0.23 for on-test ADG, −0.31 ± 0.21 for overall ADG, −0.39 ± 0.21 for final BW, −0.22 ± 0.22 for HCW, −0.03 ± 0.22 for LM area, 0.24 ± 0.25 for fat, and −0.43 ± 0.20 for marbling score. Similar results for the number of treatments and production traits were −1.00 ± 0.68 for acclimation ADG, −0.04 ± 0.39 for on-test ADG, −0.47 ± 0.41 for overall ADG, −0.66 ± 0.40 for final BW, −0.58 ± 0.45 for HCW, −0.12 ± 0.38 for LM area, 0.42 ± 0.50 for fat, and −0.32 ± 0.37 for marbling score. Because of the high economic cost associated with BRD incidence, even these modest estimates for heritability of BRD resistance should be considered for incorporation into beef cattle breeding programs. ABSTRACT:The primary objective of this study was to estimate variance components and heritability of bovine respiratory disease (BRD) incidence in beef calves before weaning and during the finishing phase. The second objective was to investigate the impact of BRD incidence and treatment frequency on performance and carcass traits. Bovine respiratory disease is the biggest and most costly health challenge facing the cattle industry. The 2 populations used consisted of 1,519 preweaned calves and 3,277 head of ...

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“…Embora a herdabilidade da resistência a doença seja baixa, diferenças entre raças foram detectadas (Snowder et al, 2005), notando-se que animais Bos taurus são mais susceptíveis a afecção que da espécie Bos indicus (Cusack et al, 2007), especialmente Angus e Hereford (Taylor et al, 2010). Por isso o cruzamento entre raças aumenta o vigor híbrido, sendo benéfico para a redução da doença respiratória (Snowder et al, 2005).…”

Section: Fatores Predisponentes Para Complexo Respiratório Bovinounclassified

Manejo do complexo respiratório bovino em confinamento: Revisão

Slompo

Bertagnon

Horst

et al. 2017

Pubvet

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RESUMO.O complexo respiratório bovino, também conhecido como a febre do transporte, é de grande importância econômica para a indústria pecuária de todo o mundo. O controle da doença é complicado devido a essa enfermidade ter caráter multifatorial. Diferentes combinações de fatores como associação de microrganismos patogênicos, condições ambientais estressantes e animais imunologicamente susceptíveis, podem acarretar a doença e perpetuá-la no rebanho.Palavras chave: doença respiratória bovina, febre do transporte, imunoprofilaxia Management of Bovine Respiratory Complex in Feedlot: ReviewABSTRACT. The bovine respiratory complex, also known as the transport fever, is of great economic importance to the livestock industry around the world. The control of the disease is complicated because this disease has a multifactorial character. Different combinations of factors such as the association of pathogenic microorganisms, stressful environmental conditions and immunologically susceptible animals can lead to disease and perpetuate it in the herd. Keywords: Bovine respiratory disease, transport fever, immunoprophylaxisManejo del complejo respiratorio bovino en corral de engorde: Revisión RESUMEN. El complejo respiratorio bovino, también conocido como la fiebre del transporte, es de gran importancia económica para la industria ganadera en todo el mundo. El control de la enfermedad es complicado por causa de la enfermedad tener carácter multifactorial. Las diferentes combinaciones de factores tales como la asociación de microorganismos patógenos, condiciones ambientales estresantes y animales inmunológicamente susceptibles pueden conducir a la enfermedad y perpetuarlo en el rebaño.Palabras clave: enfermedad respiratoria bovina, fiebre del transporte, inmunoprofilaxis IntroduçãoAs doenças infecciosas em ruminantes, tais como o complexo respiratório bovino (CRB), são conhecidas por terem um significativo impacto econômico negativo na pecuária intensiva tanto de corte quanto de leite no tocante aos custos de

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Influence of breed, heterozygosity, and disease incidence on estimates of variance components of respiratory disease in preweaned beef calves

Cited by 87 publications

References 25 publications

Calf management practices and associations with herd-level morbidity and mortality on beef cow-calf operations

Calf management practices and associations with herd-level morbidity and mortality on beef cow-calf operations

Evaluation of fixed sources of variation and estimation of genetic parameters for incidence of bovine respiratory disease in preweaned calves and feedlot cattle12

Manejo do complexo respiratório bovino em confinamento: Revisão

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