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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Serological investigation of antibodies against respiratory viruses in calves from Brazilian family farming and their relation to clinical signs of bovine respiratory disease

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Author(s):
Natália C. Gaeta [1] ; Bruno L.M. Ribeiro [2] ; Mario A.R. Alemán [3] ; Eidi Yoshihara [4] ; Eduardo C. Marques [5] ; Adriana N. Hellmeister [6] ; Edviges M. Pituco [7] ; Lilian Gregory [8]
Total Authors: 8
Affiliation:
[1] Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia. Departamento de Clínica Médica - Brasil
[2] Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia. Departamento de Clínica Médica - Brasil
[3] Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia. Departamento de Clínica Médica - Brasil
[4] Agência Paulista de Tecnologia dos Agronegócios. Departamento de Descentralização do Desenvolvimento. Pólo Regional de Desenvolvimento Tecnológico dos Agronegócios da Alta Sorocabana - Brasil
[5] Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia. Departamento de Clínica Médica - Brasil
[6] Instituto Biológico de São Paulo. Laboratório de Viroses de Bovídeos - Brasil
[7] Instituto Biológico de São Paulo. Laboratório de Viroses de Bovídeos - Brasil
[8] Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia. Departamento de Clínica Médica - Brasil
Total Affiliations: 8
Document type: Journal article
Source: Pesquisa Veterinária Brasileira; v. 38, n. 4, p. 642-648, 2018-04-00.
Abstract

ABSTRACT: Bovine respiratory disease (BRD) is responsible for economic losses in cattle production. Viruses are categorized as primary etiological agents. The aims of this study were to evaluate the presence of antibodies against bovine viral diarrhea virus (BVDV), bovine herpes virus type 1 (BoHV-1), and bovine respiratory syncytial virus (BRSV) in healthy and BRD calves from family farming in relation to clinical signs of BRD. Hundred and forty-five calves were randomly selected and physical examination was performed. Only 123 animals were classified as healthy and BRD calves. Antibodies were evaluated by virus neutralization test. Person’s Chi-square test and Fisher’s exact test were performed as univariate analysis. Binary Logistic Regression was applied as multivariate analysis. Variables with P<0.10 were considered statistically significant. Variables with 0.15<P<0.10 were considered as statistical tendencies. Antibodies against BoHV-1, BVDV, and BRSV were detected in 32%, 23% and 37% animals. Antibodies against both three viruses were detected in 26.8% of calves. The presence of antibodies against BRSV were associated to normal heart rates (P=0.018) and unilateral airflow (P=0.035). Tendency was observed to unilateral airflow (P=0.06) Statistical tendencies were observed to Ab-BoHV-1 and body temperature (P=0.119) and breathing pattern (P=0.123). The profile of antibodies against respiratory viruses in calves from Brazilian family farming was firstly described. The results confirmed the importance of some clinical signs to viral infection. (AU)

FAPESP's process: 14/03188-3 - Clinical evaluation of bronchopneumonia of calves in the settlements in the region of Presidente Epitácio and Presidente Venceslau
Grantee:Natália Carrillo Gaeta
Support Opportunities: Scholarships in Brazil - Master