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

• Type: Article in International Scientific Journal
• Date: 2005

Authors

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

Journal

Title: Preventive Veterinary Medicine

Vol. 72

Pages: 81-85

ISSN: 0167-5877

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 8 Citations

Scopus - 6 Citations

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5