Risk factors analysis applied to antibodies to Bovine Herpesvirus Type 1, Bovine Viral Diarrhea Virus, Bovine Leukemia Virus and Brucella abortus among cattle: a cross-sectional study

Bezerra, Nancyleni Pinto Chaves; Bezerra, Danilo Cutrim; Santos, Hamilton Pereira; Pereira, H. de M.; Silva, Ana Lúcia Abreu

doi:10.21708/avb.2019.13.1.7818

Cited by 8 publications

(6 citation statements)

References 10 publications

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“…Many farms that do not belong to ADSG now also practice such controls. Purchased cattle are considered to be the main risk factor for disease entry to dairy farms (3,26–29).…”

Section: Discussionmentioning

confidence: 99%

A survey of biosecurity measures applied on dairy cattle farms in Spain

Villaamil¹,

Arnaiz²,

Allepuz

et al. 2019

Preprint

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32Attention to biosecurity has been highlighted as the most important measure to reduce 33 and prevent the introduction of diseases to farms. There is little published information 34 about the biosecurity of dairy cattle in Spain. We therefore aimed to assess and 35 characterize the current application of biosecurity measures on dairy cattle farms in 36 Spain, and relate these to bovine viral diarrhea and infectious bovine rhinotracheitis. 37From July 2017 to April 2018, data on biosecurity measures for 124 dairy herds were 38 collected using a questionnaire. We also assessed the sanitary status of these farms 39 (efficacy of measures implemented against both diseases using antibody ELISA. Data 40 were analyzed descriptively, and using multiple correspondence analysis and a two-step 41 cluster analysis. Measures to prevent disease introduction were often poorly 42 implemented. Three main clusters of farms were identified: Clusters 1 and 2 included 43 herds of small and intermediate sizes, respectively. These, particularly cluster 1, showed 44 the most deficiencies in the control of vehicles and visitors. However, individual 45 purchases usually involved low numbers of animals, especially in cluster 2, and animals 46 were tested for bovine viral diarrhea and infectious bovine rhinotracheitis at their places 47 of origin or on arrival at farms. Farms in clusters 1 and 2 were frequently under 48 voluntary control programs. Cluster 3 had the largest herd sizes, with somewhat better 49 biosecurity control of vehicles and visitors. However, farms in this cluster also 50 purchased the most animals, sometimes without testing, and hired external workers 51 most often. Farms in cluster 1 showed the best sanitary level, followed by clusters 2 and 52 3. Collecting data such as these is an important first step to identification of biosecurity 53 shortcomings, and to structuring of adequate follow-up to ensure that measures are 54 implemented correctly on farms in Spain. 4 55

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“…Many farms that do not belong to ADSG now also practice such controls. Purchased cattle are considered to be the main risk factor for disease entry to dairy farms (3,26–29).…”

Section: Discussionmentioning

confidence: 99%

A survey of biosecurity measures applied on dairy cattle farms in Spain

Villaamil¹,

Arnaiz²,

Allepuz

et al. 2019

Preprint

View full text Add to dashboard Cite

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“…The prevalence of the included studies ranged from 9.3% (Zardo, 2017) to 86.28% (Okuda et al, 2006) for animals and 27.88% (Miranda, 2012) to 100% for herds (Alexandrino et al, 2011;D. C. Bezerra et al, 2012;N. P. C. Bezerra et al, 2019;Fino, 2011;Freitas et al, 2014;Matos, 2004;Mineo et al, 2006;Okuda et al, 2006;Thompson et al, 2006;Tomich et al, 2009;Santos et al, 2014;B.…”

Section: Resultsmentioning

confidence: 99%

“…A. Dias et al, 2008;M. S. Lima, Nogueira, Okuda, Stefano, & Pituco, 2011;Oliveira, Lorenzetti, Alfieri, & Lisbôa, 2015; N. P. C. Bezerra, Bezerra, Santos, Pereira, & Silva, 2019;Haas et al, 2020). The form of presentation and severity of infections and their pathogenesis varies according to BoAHV1 virulence, in addition to the fact that the agent is able to establish latency, contributing to the maintenance of BoAHV1 infection in the herd through asymptomatic animals that spread the virus in healthy hosts (Biswas, Bandyopadhyay, Dimri, & Patra, 2013).…”

Section: Introductionmentioning

confidence: 99%

Economic impacts of Bovine alphaherpesvirus 1 infection in Brazil: Meta-analysis based on epidemiological indicators

Silva

Aragão

Pinheiro

2021

Semina: Ciênc. Agrár.

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This study aimed to conduct a systematic review to estimate the economic impact of Bovine alphaherpesvirus 1 (BoAHV1) infection in Brazil using epidemiological indicators through a meta-analysis. Specific descriptors were used to retrieve studies from the Scopus, PubMed, Biblioteca Digital Brasileira de Teses e Dissertações, and Catálogo de Teses e Dissertações da Capes databases, selecting those that met the inclusion criteria established between the years 2000 and 2020. The selected studies were subjected to descriptive statistical analysis using prevalence data as the primary outcome with a 95% confidence interval (CI) with a meta-analysis of random effects and measures of heterogeneity, significance, magnitude of the effect, and measurement of publication bias. Abortion costs and estimates were calculated based on the prevalence of BoAHV1 infection in Brazil and the characteristics of the agent as viral subtypes that cause abortion, period of occurrence, average pregnancy rate, and morbidity applied to susceptible animals and animal replacement values. The results were obtained from 49 studies included for meta-analysis where a prevalence of BoAHV1 infection of 54.12% (95% CI: 49.07% - 59.26%) in the bovine population and 88.53% (95% CI: 82.97%–92.43%) was present. From the structured formula, it is estimated that 258,779 bovine abortions occur, which causes a total loss, based only on the occurrence of abortion, of US $ 48,402,244.00 to the country. It is noteworthy that because of the losses caused, strict control and eradication measures need to be implemented based on the elaboration of normative instruction that includes health education measures, vaccination, tests for traffic, and animal trade so that BoAHV1 infections do not continue to negatively impact national producers economically, productively, and socially.

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“…Thus, the existence of control programmes has an impact on the sanitary status of these farms; however, apart from the control of purchased animals (mandatory), the ADSG programmes do not seem to have significant influence on the application of many other measures concerning biosecurity (recommended but not mandatory), judging by the critical deficiencies that have been observed. Although purchased cattle are considered to be the main risk factor for disease entry to dairy farms, [37][38][39][40][41] the importance of other measures should not be underestimated and may result in less use of monetary and labour resources intended for control programmes.…”

Section: Discussionmentioning

confidence: 99%

A survey of biosecurity measures and serological status for bovine viral diarrhoea virus and bovine herpesvirus 1 on dairy cattle farms in north‐west and north‐east Spain

Villaamil¹,

Arnaiz

Allepuz³

et al. 2020

Veterinary Record Open

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BackgroundBiosecurity is a key measure to reduce and prevent the introduction of diseases to farms and minimise spread of diseases within a herd. The aim of the study was to characterise the current application of biosecurity measures on dairy cattle farms in Spain along with their bovine viral diarrhoea and infectious bovine rhinotracheitis status.MethodsData on biosecurity measures for 124 dairy herds were collected using a questionnaire. The sanitary status of these farms for bovine viral diarrhoea and infectious bovine rhinotracheitis was also assessed using antibody ELISA. Data were analysed using multiple correspondence analysis and a two-step cluster analysis.ResultsThree main clusters of farms were identified: clusters 1 and 2 included herds of small and intermediate sizes. These, particularly cluster 1, showed the most deficiencies in the control of vehicles and visitors. However, laboratory tests were always performed on purchased animals. Cluster 3 had the largest herd sizes, with somewhat better biosecurity control of vehicles and visitors. However, farms in this cluster also purchased the most animals, sometimes without testing, and hired external workers more often.ConclusionThe study indicated that, in the study population, there are serious shortcomings in the application of biosecurity measures on dairy farms, exposing them to disease transmission. This survey also highlights regional and herd size-related differences in the implementation of biosecurity. Collecting data is an important first step to identification of specific weaknesses in different farm typologies, and an adequate follow-up is needed to ensure that measures are implemented correctly on farms.

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Risk factors analysis applied to antibodies to Bovine Herpesvirus Type 1, Bovine Viral Diarrhea Virus, Bovine Leukemia Virus and Brucella abortus among cattle: a cross-sectional study

Abstract: Fatores de risco associados às infecções causadas por Herpesvírus Bovino Tipo I, Vírus da diarreia viral bovina, Vírus da leucose bovina e Brucella abortus em rebanhos bovinos: um estudo transversal

Cited by 8 publications

References 10 publications

A survey of biosecurity measures applied on dairy cattle farms in Spain

A survey of biosecurity measures applied on dairy cattle farms in Spain

Economic impacts of Bovine alphaherpesvirus 1 infection in Brazil: Meta-analysis based on epidemiological indicators

A survey of biosecurity measures and serological status for bovine viral diarrhoea virus and bovine herpesvirus 1 on dairy cattle farms in north‐west and north‐east Spain

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