Perfil da infecção pelo vírus da diarreia viral bovina (BVDV) em um rebanho bovino leiteiro de alta produção e com programa de vacinação contra o BVDV

Dezen, Stelamaris; Otonel, Rodrigo Alejandro Arellano; Alfieri, Amauri Alcindo; Lunardi, Michele

doi:10.1590/s0100-736x2013000200002

Cited by 19 publications

(13 citation statements)

References 29 publications

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“…PI animals exhibit immunotolerance to the homologous strain of the virus, but may be immunocompetent relative to other strains, unlike induced tolerance. In these cases, the PI animal may be positive for the virus (direct testing of the agent by PCR or ELISA antigen) and the reagent in the seroneutralization test for the heterologous strain (antibodies) (DEZEN et al, 2013). Further studies should be conducted in this region to identify PI animals and to determine the percentage of these animals in herds, given that they act as potential sources of infection.…”

Section: Discussionmentioning

confidence: 99%

“…Sanitary measures, based on risk factors are the basis for effective sanitary management (NISKANEN; LINDBERG, 2003). The adoption of specific measures, such as the disinfection of veterinary instruments (FODDAI et al, 2014), vaccination (RIBEIRO;PEREIRA, 2004;DEZEN et al, 2013), the identification and elimination of PI animals (RIBEIRO; PEREIRA, 2004) and laboratory examinations for replacement animals (SMITH et al, 2014) are indicated as effective measures to control BVDV infection. Coupled with increased knowledge of the disease, the adoption of such measures could lead to improved production efficiency and increased economic profitability.…”

Section: Discussionmentioning

confidence: 99%

“…In more, BVDV2, severe cases, mucosal disease (MD) and hemorrhagic syndrome (HS) are common SAMARA, 2003;FLORES et al, 2005). BVDV is also associated with reproductive disorders, such as heat repetition (GÜR, 2011), embryonic mortality (DEZEN et al, 2013), metritis and the retention of placenta (ASMARE et al, 2013). The mild form of the disease is significant, since the animals do not exhibit any clinical signs and consequently, many producers cannot identify the losses to the cattle industry (DIAS; SAMARA, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Epidemiological analysis of infection by the bovine viral diarrhea virus on family farms in Brazil

Rêgo

Filho

Oliveira

et al. 2016

SCA

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The aim of the present study was to determine the seroprevalence of infection by the bovine viral diarrhea virus (BVDV) on family farms, as well as to study the risk factors associated with the infection. In total, 319 blood serum samples were collected from cattle, of reproductive age (>24 months) in 24 herds from 11 cities of the brejo microregion in Pernambuco. The samples were subjected to the seroneutralization test to detect anti-BVDV antibodies. In order to identify the risk factors associated with the BVDV, a questionnaire epidemiologic was applied and followed by statistical analysis of logistic regression, with the serological test considered as the dependent variable (reagent or non-reagent). A prevalence of 51.1% (163/319; C.I. 45.5% -56.7%) was found in the present study. Of the 24 herds sampled, 100.0% contained at least one reagent animal. The prevalence in the counties ranged from 23.1% to 70.0%. The following risk factors were identified in the present study: not providing colostrum (OR 3.85; p=0.018); disease unknown (OR 2.54; p=0.001) and consortium breeding (OR 1.76; p=0.013). Based on these results, it was clear that BVDV infection is widespread in herds on family farms in the microregion studied herein. Health education policies must be implemented for producers and professionals who provide technical assistance. In addition, based on the risk factors identified in the present study, hygiene-sanitary measures should be implemented in order to reduce the prevalence of the BVDV. Key words: BVDV. Cattle. Diagnosis. Risk factors. ResumoObjetivou-se com este estudo determinar a soroprevalência e estudar os fatores de risco associados à infecção pelo vírus da diarreia viral bovina (BVDV) nas unidades produtivas de agricultura familiar. Foram coletadas 319 amostras de soro sanguíneo, de bovinos em idade reprodutiva (>24 meses), procedentes de 24 rebanhos bovinos em 11 municípios da microrregião brejo pernambucano. As amostras foram submetidas ao teste de soroneutralização para detecção de anticorpos anti-BVDV. Para a identificação dos fatores de risco associados ao BVDV, foi aplicado um questionário epidemiológico e foi realizada uma análise estatística de regressão logística, considerando como variável dependente o exame sorológico (reagente ou não reagente). Observou-se com este estudo uma prevalência de 51,1% (163/319; I.C. 45,5% -56,7%). Dos 24 rebanhos amostrados, 100% apresentaram pelo menos um animal reagente. A prevalência nos municípios variou de 23,1% a 70,0%. Os fatores de risco identificados neste estudo foram: não fornecer colostro (OR 3,85; p=0,018); não conhecer a enfermidade (OR 2,54; p=0,001) e criação consorciada (OR 1,76; p=0,013). Diante dos resultados obtidos, constatou-se que a infecção pelo BVDV está disseminada nos rebanhos de agricultura familiar na microrregião estudada e que políticas de educação em saúde devem ser implementadas tanto para os produtores como para os profissionais que prestam assistência técnica. Além disso, medidas higiênico-sanitárias com base n...

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Epidemiological analysis of infection by the bovine viral diarrhea virus on family farms in Brazil

Rêgo

Filho

Oliveira

et al. 2016

SCA

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“…Neste sentido, um programa de vacinação, por exemplo, não previne todas as infecções em animais individualmente . Dezen et al (2013) …”

Section: Discussionunclassified

Detecção do virus ‘HoBi’-like (BVDV-3) em bovino no semiárido do Estado da Paraíba

et al. 2016

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RESUMO.-Objetivou-se descrever os aspectos clínicos e anatomopatológicos, e a identificação viral de um caso de infecção pelo vírus 'Hobi'-like (BVDV-3) em bovino do semiárido paraibano, Nordeste do Brasil. Um bovino, fêmea, três meses de idade, foi levado ao Hospital Veterinário da UFCG apresentando salivação, dificuldade de apreensão do teto, falta de apetite, fezes escuras e em pouca quantidade. Diante da piora do quadro clínico optou-se por sua eutaná-sia in extremis, seguida da realização da necropsia e coleta de material para histopatologia. Histologicamente, nas mucosas do trato digestivo, havia edema, degeneração balonosa, necrose e infiltrado inflamatório, que foi observado na face dorsal da língua e no seu epitélio mais profundo. The aim of this study was to describe the clinical and anatomopathological aspects, and the viral identification of a case of 'Hobi'-like (BVDV-3) vírus infection in cattle from the semiarid of Paraiba State, Northeastern Brazil. A female bovine, three months old, was sent to the UFCG's Veterinary Hospital presenting salivation, difficulty of ceiling seizure, lack of appetite, dark feces and in small amounts. Due to worsening of symptoms it was decided to in extremis euthanasia, followed by the necropsy and collection of material for histopathology. Histologically, in the mucous membranes of the digestive tract there were edema, ballooning degeneration, necrosis and inflammatory infiltrate, which was observed on the dorsal surface of the tongue and in its deepest epithelium. The immunohistochemical of skin biopsies of the extremity of the ear (ear notches) showed positive antigenic marking and by RT-PCR it was possible to detect viral RNA of BVDV in the serum, whose cytopathic effect in epithelial cells of bovine kidney lineage "Madin Darby bovine kidney" (MDBK)was not observed. The sequencing of the 5'NCR gene showed that the virus isolated was more related to 'Hobi'-like (BVDV-3). After confirming the diagnosis serum samples were collected from 23 animals for serology by indirect ELISA, and a seropositivity of 69.6% (16/23) was found. The identification of this new case of 'Hobi'-like infection in Paraiba reaffirms the need for regular BVDV monitoring in the region to early detection of infection in the herds and adoption of effective preventive and control measures.INDEX TERMS: Cattle, BVDV-3, pestivirus, viral identification.

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“…In Brazil, the main causes of congenital malformations in ruminants are the ingestion of toxic plants, such as Mimosa tenuiflora (PIMENTEL et al, 2007;DANTAS et al, 2010) and Poincianella pyramidalis (REIS et al, 2016;MARCELINO et al, 2017), restricted to the Caatinga Biome, in the semiarid region of Northeast Brazil, and absent from the property in the present report. Other infectious agents of congenital malformations and reproductive alterations, such as embryonic death and abortion, included the BVDV (PAVARINI et al, 2008;DEZEN et al, 2013) and bluetongue virus (LAGER, 2004;ANTONIASSI et al, 2010). In the dairy basin from which this calf originated, a molecular diagnosis of BVDV infection had been performed in a cow that aborted a 4-monthold fetus (LOPES et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Segmental hypoplasia of the spinal cord and syringomyelia in a calf

et al. 2020

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Congenital malformations are functional and structural changes in organ systems, tissues, or organs that may develop during the embryonic or fetal phase. Spinal cord malformations, such as segmental hypoplasia of the spinal cord (SHSC) and syringomyelia, are rare in bovines. A Girolando calf from Valença, Rio de Janeiro, was admitted to the Veterinary Hospital of Universidade Federal Rural do Rio de Janeiro because of motor incoordination. Clinical evaluation revealed a 5-cm depression area in the spine at the dorsal line of the thoracic region. Neurological examination revealed reduced proprioception, pelvic limb extension with increased nociceptive activity, and reduced anal reflex. In radiographic examination, the body of the T11 vertebra had a trapezoidal wedge shape with ventral hemivertebra, probable agenesis or hypoplasia of the T11-T12 spinous processes, and fusion of the T9-T10 spinous processes. Myelography revealed extradural spinal compression caused by vertebral malformations. Necropsy showed no spinous processes (T11-T12), cranial stenosis in the medullary canal (T11-T13), and 1-3-mm pores in the white matter of the thoracic spinal cord (T8-T11). Microscopy revealed cystic dilatations in the white matter (T9-T11), cystic areas of varying sizes (T8-T9), and moderate reduction in the gray matter around the central canal of the medulla (T11-T13). Here, we reported the clinical and pathological findings of SHSC and syringomyelia in a Girolando calf. The features should be differentiated from other spinal cord syndromes. Congenital malformations are of economic importance, and their etiology and diagnosis are fundamental to disease control and progenitor-selection programs.

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Perfil da infecção pelo vírus da diarreia viral bovina (BVDV) em um rebanho bovino leiteiro de alta produção e com programa de vacinação contra o BVDV

Cited by 19 publications

References 29 publications

Epidemiological analysis of infection by the bovine viral diarrhea virus on family farms in Brazil

Epidemiological analysis of infection by the bovine viral diarrhea virus on family farms in Brazil

Detecção do virus ‘HoBi’-like (BVDV-3) em bovino no semiárido do Estado da Paraíba

Segmental hypoplasia of the spinal cord and syringomyelia in a calf

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