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Lack of relationship between Visna/maedi infection and scrapie resistance genetic markers

Spanish Journal of Agricultural Research, ISSN: 1695-971X, Vol: 12, Issue: 3, Page: 676-682
2014
  • 1
    Citations
  • 0
    Usage
  • 11
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    1
    • Citation Indexes
      1
  • Captures
    11

Article Description

The relationship between Visna/maedi virus (VMV) antibody status and scrapie genetic resistance of 10,611 Rasa Aragonesa sheep from 17 flocks in Aragón (Spain) was investigated. The fifteen most common PRNP gene haplotypes and genotypes were identified and the genotypes were classified into the corresponding scrapie risk groups (groups 1 to 5). ARQ (93.3%) and ARR (31.8%) were the most common haplotypes and ARQ/ARQ (56%) and ARR/ARQ (25.6%) were the most common genotypes. The frequencies of scrapie risk groups 1, 2, 3, 4 and 5 were 3.3%, 27.3%, 63.5%, 1.2% and 4.8%, respectively. Overall Visna/maedi seroprevalence was 53% and flock seroprevalence ranged between 21-86%. A random effects logistic regression model indicated that sheep VMV serological status (outcome variable) was not associated with any particular scrapie risk group. Instead, VMV seropositivity progressively increased with age, was signif icantly greater in females compared to males and varied between flocks. The absence of a relationship between VMV infection and scrapie genotypes is important for VMV control and specifically for sheep participating in an ELISA-based Visna/maedi control program.

Bibliographic Details

Eider Salazar; Marta Pérez; Belén Marín; Cristina Acín; Juan José Badiola; Lluís Luján; Eduardo Berriatua; Inmaculada Martín-Burriel; Ramsés Reina; Damián de Andrés; Beatriz Amorena

Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA)

Agricultural and Biological Sciences

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