Dr. David Wright - PRRS: Understanding the Current State, Future Impact and What Producers Can Do To Reduce Their Risk
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The document discusses the current situation of PRRS (Porcine Reproductive and Respiratory Syndrome) in Minnesota and nationally. It provides an update on the progress of the Minnesota N212 Regional PRRS Elimination Project, including a decrease in positive sites. Additional research findings are presented on monitoring during herd closure, impacts of PRRS vaccination methods, and transport biosecurity. Opportunities for further progress in 2014 include expanding to include PEDV and automating data collection. Continued cooperation and communication are needed to control and eliminate PRRS.
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Dr. David Wright - PRRS: Understanding the Current State, Future Impact and What Producers Can Do To Reduce Their Risk
- 1. PRRS: Current Situation Applied Research Opportunities Minnesota Pork Congress January 14, 2014 Dave Wright, N212 Coordinator
- 3. MN N212 REGIONAL PRRS ELIMINATION PROJECT UPDATE
- 4. MN N212 Jan 2014
- 5. N212 Progress Report 2009 Jan 2013 Jan 2014 Sites Identified 446 812 872 Signed Participation Agreements 266 408 567 Positive PRRS Sites 38 89 72 18 88 273 308 88 107 343 296 Stable Vaccinated Negative PRRS 247 Empty Sites Unknown Status 181
- 9. Stevens County Area Jan 2013
- 10. Stevens County Area Jan 2014
- 13. PRRS Incidence Study National PRRSv Incidence Project Current Exponentially Weighted Moving Average Analysis 12/20/2013 Steve Tousignant SDEC Website
- 14. PRRS Incidence Study Cumulative Incidence 12/20/2013 Steve Tousignant SDEC Website
- 15. Future Impact of PRRS PRRS is still with us, but there is hope!
- 16. Progress Through Application of Research
- 17. PRRSv Alone: Impact on Grow-Finish • • • • • Reduced growth rate: 20% Reduced feed intake: 7% Reduced feed efficiency: 15% Cost: $14 per head Extended finishing period by 25 days N Gabler, et al-ISU
- 18. Daniel Linhares PRRS Elimination Study • TTN-Total Time to Negative • TTBP-Total Time to Baseline Production • Observations on Standard Testing Protocols
- 19. More Aggressive Monitoring During Herd Closure Monitoring scheme based on n=30 samples/month over 4 months assumes that PRRSv infection dies out within 90 days once prevalence is below 10%. We showed that this is not always the case. Linhares-UofM
- 20. Herd Closure Monitoring • 3 consecutive samples of 30 pigs PCR negative at 2-week intervals • 3 consecutive samples of 60 pigs PCR negative at 2-week intervals • Collect 6 rope samples from 12 litters on weeks opposite serum collection • Monthly testing of weaned pigs and sampling of 10 head of naïve sentinels Pipestone Vet Clinic
- 21. Herd Closure based on “Best Practices” • Exposure method: MLV over LVI Shorter TTBP despite longer TTN MLV better economical choice than LVI Linhares UofM • Break Point for Control vs Eradication: 3 Years (If frequency of new break > 3yrs, Eradicate; If < 3 yrs, Control) Clayton Johnson, Maschoffs
- 22. Bioportal • Powerful real-time mapping and data analysis system using shared information • Andres Perez now on staff at University of Minnesota
- 23. Packing Plant Transport Biosecurity Study • 17% positive on arrival; 11% of clean positive on departure • 1/3 (28%) of trucks leaving packing plant are contaminated with PEDv • Prompted discussion-best practices -Allow driver to remain in cab -Side entry trailers/line of separation P. Yeske et. al. NPB
- 24. Progress in 2013 • Delayed incidence of new infections nationally • Recovery in Stevens County area • Value of regional control efforts More than 30 similar projects nationally • Attitude changes allowing shared information
- 25. Opportunities for 2014 • Include PEDV in N212 project • Automated downloading of participant’s lab reports from MN, SDSU and ISU VDL’s • Bar code labels with Prem ID’s available • Investigate the feasibility of making PRRS and/or PEDV a reportable disease
- 26. Needs for the Future • Vaccine with consistent cross protection and marker capability • Ability to predict immunity • Improved surveillance testing and reporting Continue to Cooperate and Communicate!
- 27. Thanks! • MN Pork Producers, MN Pork Board • University of Minnesota-SDEC Montse Torremorell, Bob Morrison • Supporting Veterinarians • Participating Producers
- 28. Dave Wright, D.V.M. 763-242-7535 wright2me.dave@gmail.com MN N212 Regional PRRS Elimination Project Coordinator