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.
13. PRRS Incidence Study
National PRRSv Incidence Project
Current Exponentially Weighted Moving Average Analysis 12/20/2013
Steve
Tousignant
SDEC
Website
17. PRRSv Alone:
Impact on Grow-Finish
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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