Estimated BVDV-prevalence, -contact and -vaccine use in dairy herds in Northern Portugal

• Tipo: Artigo em Revista Científica Internacional
• Data: 2005

Autores

Niza Ribeiro, J (Autor) ICBAS; Pereira, A (Autor) Outra; Souza, J (Autor) Outra; Madeira, H (Autor) Outra; Barbosa, A (Autor) Outra; Afonso, C (Autor) Outra

Revista

Título: Preventive Veterinary Medicine

Vol. 72

Páginas: 81-85

ISSN: 0167-5877

Editora: Elsevier

Indexação

ISI Web of Knowledge - 8 Citações

Scopus - 6 Citações

Outras Informações

ID Authenticus: P-000-0G9

DOI: 10.1016/j.prevetmed.2005.06.005

Abstract (EN): A study to evaluate BVDV-prevalence, recent-contact and -vaccine use in dairy herds in the "Entre Douroe Minho" (EDM) region in North Portugal was carried out in 124 dairy herds in 2003. Herds were visited to ascertain BVDV-vaccine use and to collect a bulk tank milk (BTM) sample and serum from 1268 cattle to analyse BVDV-antibodies using an NS2-3 ELISA. Fifty-three percent of farmers used inactivated BVDV-vaccines whilst the remaining farmers were not presently using BVDV-vaccines. BMT-antibody results included 35% positives, 25% negative and 39% inconclusive, and were similar in vaccinated and non-vaccinated herds (p > 0.05) and allowed estimating a 10% BVDV herd-prevalence from prior knowledge of the relationship between BMT-antibody results and probability of PI cattle in the herd. Overall individual seroprevalence was 27% and was 23% in non-vaccinated and 36% in vaccinated cattle (p < 0.05). Contact of the herd with BVDV was assessed according to seroprevalence in young and adult cattle in the herd and it was estimated that 35% of herds were infected or had recent contact with BVDV, 40% were not infected and did not have recent contact with BVDV and the BVDV-infection and contact status of remaining herds was undetermined. The results from this study indicate BVDV is endemic and BVDV-vaccines are widespread in the dairy-cattle population in EDM region in Portugal.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5