Detecção de anticorpos contra o vírus respiratório sincicial bovino (BRSV) em rebanhos leiteiros com diferentes prevalências de herpesvirus bovino tipo 1 (BoHV-1) no Estado de São Paulo, Brasil
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Data
2011-01-01
Autores
Affonso, Ingrid Bortolin
Gatti, Sandra Possebon
Alexandrino, Bruna
Oliveira, Mônica Costa
De Medeiros, Andréa Souza Ramos
Da Glória Buzinaro, Maria
Samara, Samir Issa
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Resumo
Serum samples from three dairy farms classified as high (1, 78.6%), medium (2, 40.0%) and low (3, 1.6%) prevalence for bovine herpesvirus type 1 (BoHV-1) from São Paulo State, were collected to analyze the prevalence to the bovine respiratory syncytial virus (BRSV) by virus neutralization test. The BRSV observed prevalences for farms 1, 2, and 3 were 45.61%, 84.42%, and 54.09%, respectively. Farm 2 showed higher prevalence to BRSV (P < 0.0001) than farms 1 and 3, which were equivalent (P = 0.2291). Two risk factors, herd size and milder climate conditions, were associated to BRSV. The prevalence of BRSV in farm 1 was statistically lower than BoHV-1 prevalence (P < 0.0001). On the other side, farms 2 and 3 have prevalences of BRSV higher than of BoHV-1 (P < 0.0001 in both comparisons). We may conclude, at least for the studied farms, that BRSV and BoHV-1 did not interact and the differences observed between BRSV and BoHV-1 prevalences into each herd did not have epidemiological importance.
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Bovine herpesvirus type 1, Bovine respiratory syncytial virus, Brazil, Prevalence, Virus neutralization test
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Semina:Ciencias Agrarias, v. 32, n. 1, p. 295-300, 2011.