A basic requirement of live vaccine virus strains is that natural transmission of vaccine virus is minimal or non-existent (3).
The objectives of this study were (a) to determine the frequency of the EU and the NA genotype PRRS vaccine viruses in a large sample of pigs from North-Western Germany, (b) to assess the association between vaccine isolate detection and vaccination history and (c) to characterise the identified vaccine isolates considering their origin.
Elisabeth Grosse Beilage1, Heiko Nathues1, Diana Meemken1, Timm C. Harder2, Marcus G. Doherr3, Inga Grotha4, Irene Greiser-Wilke4
1. Field Station for Epidemiology, University of Veterinary Medicine Hannover, Bakum, Germany;
2. Institute of Diagnostic Virology, Friedrich-Loeffler Institute, Greifswald - Insel Riems, Germany;
3. Dept. Clinical Research & Veterinary Public Health, Vetsuisse Faculty, University of Bern, Bern, Switzerland;
4. Institute of Virology, Department of Infectious Diseases, University of Veterinary Medicine Hannover, Hannover, Germany
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