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Serological survey for antibodies against pestiviruses in sheep in Austria
  1. R. Krametter-Frötscher, DrMedVet1,
  2. A. Loitsch, DrMedVet3,
  3. H. Kohler, DrMedVet1,
  4. A. Schleiner, DrMedVet1,
  5. P. Schiefer, DrMedVet1,
  6. K. Möstl, DrMedVet2,
  7. F. Golja, DipIng4 and
  8. W. Baumgartner, DrMedVet1
  1. 1 Clinic for Ruminants, Department for Farm Animals and Herd Management, University of Veterinary Medicine, Veterinärplatz 1, A-1210 Vienna, Austria
  2. 2 Clinical Virology, Clinical Department for Diagnostic Imaging, Infectious Diseases and Clinical Pathology, University of Veterinary Medicine, Veterinärplatz 1, A-1210 Vienna, Austria
  3. 3 Austrian Agency for Health and Food Safety, Institute for Veterinary Disease Control, Robert Kochgasse 17, A-2340 Mödling, Austria
  4. 4 Institute for Applied Statistics and System Analysis, Joanneum Research, Steyrergasse 25a, A-8010 Graz, Austria

Abstract

The prevalence of antibodies to pestiviruses was investigated in 4931 sheep, in 377 flocks, in four federal states of Austria, by means of an indirect elisa that detected antibodies to Border disease virus (bdv) and bovine viral diarrhoea virus (bvdv). The mean flock prevalence was 62·9 per cent and the mean individual prevalence was 29·4 per cent. Comparative neutralisation studies on the elisa-positive samples with bvdv type 1 (bvdv-1), bvdv type 2 (bvdv-2) and bdv recorded 336 samples with higher titres (more than four times average) to bvdv-1, three samples with higher titres to bvdv-2 and 55 samples with higher titres to bdv. The other samples did not show clear differences in antibody titres against the strains of pestivirus tested because of cross-reactions. The seroprevalence of pestiviruses in sheep was significantly higher on farms with cattle. There were significant regional differences between the prevalences in flocks and individual sheep, the highest prevalences being in the region of Austria where communal alpine pasturing of sheep, goats and cattle is an important part of farming.

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