BOVINE RESPIRATORY SYNCYTIAL VIRUS (BRSV) ACTIVITY IN DAIRY CALVES

Authors

  • Ingrid Bortolin Affonso Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal FCAV/UNESP
  • Sandra Possebon Gatti Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal FCAV/UNESP
  • Andréa S. R. de Medeiros Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal FCAV/UNESP
  • Maria da Glória Buzinaro Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal FCAV/UNESP
  • Samir Issa Samara Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal FCAV/UNESP

DOI:

https://doi.org/10.5216/cab.v13i2.10318

Keywords:

Animal Sanity

Abstract

Bovine respiratory syncytial virus (BRSV) is one of the major pathogens affecting the respiratory system of young cattle, causing serious economic losses. Data on its epidemiology and occurrence in animals under one-year of age are still scarce in the literature. This study aimed to determine the occurrence of viral activity in three of BRSV seropositive dairy herds (A, B, and C), by serological monitoring of calves from the first day of life until the age of one year, by virus neutralization test. Results showed that in animals from farms A and B, antibody titers increased in the first month, characterizing passive transfer of immunity through colostrums. Over time, the titers decreased till total absence in the sixth and eighth months respectively and then antibodies titration increased in the final months of the study, probably due to natural infection. On property C, although there was a similar antibodies’ dynamics to the others, a period of total absence did not occurred, suggesting that animals may have been infected in the first months of life, despite the presence of colostral antibodies. This study demonstrated fluent BRSV activity amongst animals in all properties.

KEYWORDS: antibody titer; bovine respiratory syncytial virus; screening; viral activity; virus neutralization.

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Author Biographies

Ingrid Bortolin Affonso, Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal FCAV/UNESP

Doutoranda do Programa de Pós-graduação em Medicina Veterinária. Departamento de Medicina Veterinária Preventiva e Reprodução Animal da Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal FCAV/UNESP

Sandra Possebon Gatti, Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal FCAV/UNESP

Docente do Colégio Técnico Agrícola "José Bonifácio" da Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal FCAV/UNESP

Andréa S. R. de Medeiros, Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal FCAV/UNESP

Assistente de Suporte Acadêmico I do Departamento de Medicina Veterinária Preventiva e Reprodução Animal da Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal FCAV/UNESP

Maria da Glória Buzinaro, Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal FCAV/UNESP

Professora Assistente Doutora do  Departamento de Medicina Veterinária Preventiva e Reprodução Animal da Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal FCAV/UNESP

Samir Issa Samara, Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal FCAV/UNESP

Professor Titular do  Departamento de Medicina Veterinária Preventiva e Reprodução Animal da Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal FCAV/UNESP

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Published

2012-06-27

How to Cite

AFFONSO, I. B.; GATTI, S. P.; MEDEIROS, A. S. R. de; BUZINARO, M. da G.; SAMARA, S. I. BOVINE RESPIRATORY SYNCYTIAL VIRUS (BRSV) ACTIVITY IN DAIRY CALVES. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 13, n. 2, p. 252–258, 2012. DOI: 10.5216/cab.v13i2.10318. Disponível em: https://revistas.ufg.br/vet/article/view/10318. Acesso em: 17 jul. 2024.

Issue

Vol. 13 No. 2 (2012)

Section

Veterinary Medicine

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