Associations between exposure to viruses and bovine respiratory disease in Australian feedlot cattle

Hay, Karen; Barnes, Tamsin S.; Morton, John M.; Gravel, Jennifer L.; Commins, M.A.; Horwood, Paul F.; Ambrose, Rebecca K.; Clements, Archie; Mahony, Timothy J.

doi:10.1016/j.prevetmed.2016.01.024

Cited by 30 publications

(44 citation statements)

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“…The Australian National Bovine Respiratory Disease Initiative was a prospective longitudinal study in cattle in medium-sized to large Australian feedlot cattle that identified and quantified the effects of numerous putative risk factors for BRD (Hay et al, 2014;Hay et al, 2016a;Hay et al, 2016b;Hay et al, 2016c;Hay et al, 2016d;Hay et al, 2016e). The current study extends these findings.…”

Section: Introductionsupporting

confidence: 55%

“…The causal pathways depicting relationships between variables of interest and between each of those variables and the development of BRD were hypothesised a priori as previously reported (Hay et al, 2014;Hay et al, 2016a;Hay et al, 2016b;Hay et al, 2016c;Hay et al, 2016d;Hay et al, 2016e). For some variables, the total effect was considered to be of main interest, whilst for others the direct effect was more relevant.…”

Section: Single Risk Factor Estimatesmentioning

confidence: 99%

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Population-level effects of risk factors for bovine respiratory disease in Australian feedlot cattle

Hay

Morton

Clements

et al. 2017

Preventive Veterinary Medicine

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Please cite this article as: Hay, K.E., Morton, J.M., Clements, A.C.A., Mahony, T.J., Barnes, T.S., Population-level effects of risk factors for bovine respiratory disease in Australian feedlot cattle.Preventive Veterinary Medicine http://dx.doi.org/10. 1016/j.prevetmed.2017.03.001 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. HighlightsPopulation-level effects of risk factors for BRD in feedlot cattle were determined Risk factors with large effects were shared pen water, breed, mixing and move timing BVDV in the pen, prior group size and weight had moderate or modest effects 82% of BRD incidence was attributed to management-related risk factors 2 AbstractResults obtained from a nationwide longitudinal study were extended to estimate the population-level effects of selected risk factors on the incidence of bovine respiratory disease (BRD) during the first 50 days at risk in medium-sized to large Australian feedlots.Population attributable fractions (PAF) and population attributable risks (PAR) were used to rank selected risk factors in order of importance from the perspective of the Australian feedlot industry within two mutually exclusive categories: 'intervention' risk factors had practical strategies that feedlot managers could implement to avoid exposure of cattle to adverse levels of the risk factor and a precise estimate of the population-level effect while 'others' did not. An alternative method was also used to quantify the expected effects of simultaneously preventing exposure to multiple management-related factors whilst not changing exposure to factors that were more difficult to modify. Other important risk factors identified and prioritised for further research were feedlot region, season of induction and cohort formation patterns.3 An estimated 82% of BRD incidence was attributable to management-related risk factors, whereby the lowest risk category of a composite management-related variable comprised animals in the lowest risk category of at least four of the five component variables (shared pen water, mixing, move timing, BVDV-1 in the cohort and the number of animals in the animal's group-13). This indicated that widespread adoption of appropriate interventions including ensuring pen water is not shared between pens, optimising animal mixing before induction, timing of the animal's move to the vicinity of the feedlot, and group size prior to placing animals in feedlot pens, and avoiding BVDV-1 in cohorts could markedly reduce the incidence of BRD in medium-sized to large Australian feedlots.

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Section: Introductionsupporting

confidence: 55%

Section: Single Risk Factor Estimatesmentioning

confidence: 99%

Population-level effects of risk factors for bovine respiratory disease in Australian feedlot cattle

Hay

Morton

Clements

et al. 2017

Preventive Veterinary Medicine

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“…v.11, n.4, p.381-392, Abr., 2017 tratamento, prejuízos no desempenho e bem-estar dos animais de todo o mundo, sendo considerado o maior problema de confinamento nos Estados Unidos e Austrália perda econômica e o difícil controle da doença (Snowder et al, 2006, Hay et al, 2016b.…”

Section: Pubvetunclassified

“…O BHV-1 (Bovine herpesvirus 1) é o agente etiológico responsável pela IBR (rinotraqueíte infeciosa dos bovinos) que se replica em células da mucosa, submucosa e anéis traqueais (Hay et al, 2016b). Sinais e lesões são variáveis, podendo ser serosas, hiperêmicas, com edema e exsudato mucopurulento, necrose focal e em casos mais graves, inflamação pseudomembranosa (Cusack et al, 2003).…”

Section: Herpesvirus Bovino Tipounclassified

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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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Coronaviruses in farm animals: Epidemiology and public health implications

Khbou

Jedidi

Zaafouri

et al. 2020

Veterinary Medicine & Sci

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Coronaviruses (CoVs) are documented in a wide range of animal species, including terrestrial and aquatic, domestic and wild. The geographic distribution of animal CoVs is worldwide and prevalences were reported in several countries across the five continents. The viruses are known to cause mainly gastrointestinal and respiratory diseases with different severity levels. In certain cases, CoV infections are responsible of huge economic losses associated or not to highly public health impact. Despite being enveloped, CoVs are relatively resistant pathogens in the environment. Coronaviruses are characterized by a high mutation and recombination rate, which makes host jumping and cross‐species transmission easy. In fact, increasing contact between different animal species fosters cross‐species transmission, while agriculture intensification, animal trade and herd management are key drivers at the human‐animal interface. If contacts with wild animals are still limited, humans have much more contact with farm animals, during breeding, transport, slaughter and food process, making CoVs a persistent threat to both humans and animals. A global network should be established for the surveillance and monitoring of animal CoVs.

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Associations between exposure to viruses and bovine respiratory disease in Australian feedlot cattle

Cited by 30 publications

References 26 publications

Population-level effects of risk factors for bovine respiratory disease in Australian feedlot cattle

Population-level effects of risk factors for bovine respiratory disease in Australian feedlot cattle

Manejo do complexo respiratório bovino em confinamento: Revisão

Coronaviruses in farm animals: Epidemiology and public health implications

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