VSP.LF.DK PIG RESEARCH CENTRE PRRSV control in Denmark Charlotte Sonne Kristensen Pig Research Centre Danish Agriculture & Food Council

PIG RESEARCH CENTRE Outline  PRRSV in Denmark  PRRSV eradication  Motivation of the farmers –Production loss –Antibiotic used  Conclusion

VSP.LF.DK PIG RESEARCH CENTRE PRRSV in Denmark

PIG RESEARCH CENTRE PRRSV in Denmark  First diagnose in 1992  MLV Vaccination initiated 1996

PIG RESEARCH CENTRE PRRSV vaccination  Objective –to reduce the spread of PRRSV –To concider a national eradication (3 years)  Vaccination –1000 herds vaccinated (July-December 1996) –Clinical outbreaks 2-3 month after vacc. –Disease in vaccinated and non-vaccinated neighbours –Vaccination stopped December 1996

PIG RESEARCH CENTRE PRRSV today  43% of the herds have a PRRSV declaration –73% of the sows –39% of the finishers  65% of the herds are declared free

VSP.LF.DK PIG RESEARCH CENTRE PRRSV eradication

PIG RESEARCH CENTRE Eradications

PIG RESEARCH CENTRE PRRSV  Partial depopulation –AIAO –Empty stable with continuous flow –Purchase negative breeding animals –Vaccination and quarantine  Large success rate

PIG RESEARCH CENTRE We know  PRRSV status of almost half the herds  Location of all herds  Movement of all pigs  Size of all herds  Age groups represented at each herd  How to eradicate PRRSV

VSP.LF.DK PIG RESEARCH CENTRE So why not entire Country?

PIG RESEARCH CENTRE Who should pay??

PIG RESEARCH CENTRE Motivation of the farmers  Production loss  Antibiotic use

PIG RESEARCH CENTRE Production loss ACUTE  Weekly production data from 8 herds with acute outbreak of PRRSV

PIG RESEARCH CENTRE Production loss ACUTE Weaned/litterLiveborne/litter Dead/litterStart/end PRRSV

PIG RESEARCH CENTRE Conclusion ACUTE  Outbreak weeks (average 33 weeks)  Loss sow/pen place +€5 to -€100 (average €31)  PRRSV US>PRRSV EU

PIG RESEARCH CENTRE Production loss CHRONIC  Production data annually collected  Merged with SPF status  Average on selected production parameters calculated

PIG RESEARCH CENTRE PRRSV+PRRSV-PRRSV+PRRSV Sows No herds Borne alive14,5714,5414,8414,82 Total piglet mortality, %23,3023,8222,4823,19 Weaners No herds Mortality, %2,652,882,733,29 Finishers No herds Mortality, %3,684,063,503,75

PIG RESEARCH CENTRE Conclusion CHRONIC  A little bit on mortality

PIG RESEARCH CENTRE Antibiotic use and PRRSV  PRRSV prevalence among –50 herds with highest antibiotic use –50 herds with lowest antibiotic use  No difference

PIG RESEARCH CENTRE What should motivate?  Production loss- acute MAYBEE  Production loss- chronic NO  Antibiotic use NO

PIG RESEARCH CENTRE Difficult to motivate farmers  No general coordinated PRRSV control in Denmark  Besides………………………..

PIG RESEARCH CENTRE Challenges  Antibiotic use  EU Ban on Sow Stalls  Feed prices

PIG RESEARCH CENTRE Thank you for your attention