Regional PRRSv Control Project Iowa County, Iowa Tiffany K. Yoder, MS James McKean, DVM, JD Iowa State University College of Veterinary Medicine Regional Conference March 8 -11, 2011 ISU College of Veterinary Medicine, Food Supply Veterinary Services
Map of regional projects ISU College of Veterinary Medicine, Food Supply Veterinary Services
Timelines for implementation 2005 – Stevens County, Minnesota 2009 – Stevens Co. + area north of Hwy N212 – Western Michigan – Western Illinois (HAM counties) 2010 – Pennsylvania, Colorado, Nebraska, Ontario, NW Indiana, North Central Illinois, Iowa County ISU College of Veterinary Medicine, Food Supply Veterinary Services
7 features common to all projects 1. Establish PRRS status in area 2. Map sites within area 3. Share information amongst producers 4. Sign cooperation agreements 5. Use AASV Production Animal Disease Risk Assessment Program (PADRAP) and emphasize biosecurity improvements/risks 6. Testing to monitor site status over time 7. Herd plans to reduce prevalence or eliminate PRRS virus in the region ISU College of Veterinary Medicine, Food Supply Veterinary Services
Objectives of the Iowa County Project • To demonstrate and develop steps needed to implement a regional PRRS control program • Study the impact of PRRS virus movement within a prescribed area over time • Study the impact of pig movement on the PRRS virus into and within the study area • Reduce the prevalence of the PRRS virus within the selected area ISU College of Veterinary Medicine, Food Supply Veterinary Services
Working Group Members • Iowa Pork Producers Association • Howard Hill, Cody McKinley, and Jon Caspers • Iowa State University • Drs. Butch Baker, Derald Holtkamp, James McKean, and Jeff Zimmerman, and Tiffany Yoder (Project Coordinator) • ISU Diagnostic Lab • Dr. Rodger Main and John Beary • Funding • Iowa Pork Producers Association • PIC • PRRS CAP • Boehringer Ingelheim Vetmedica Inc. ISU College of Veterinary Medicine, Food Supply Veterinary Services
Working Group Members • Veterinarians in Iowa County – Drs. Mark Brinkman, Keith Aljets, Nicolas Rippel, Jim Branstad, Duke Wilgenbusch • Veterinarians outside the county – Drs. Cameron Schmitt, James Lowe, Jason Hocker, and Thomas Petznick • Others – Lisa Becton – National Pork Board – David Schmitt – State Veterinarian ISU College of Veterinary Medicine, Food Supply Veterinary Services
Project Area • West and north of Highway 151 to Highway 6 to Highway 149 as it bisects the county • All sites with commercial pigs ISU College of Veterinary Medicine, Food Supply Veterinary Services
Project Area 34 Production sites • 14 finishers (900-4000) • 3 nursery (1200-2000) • 8 farrow-finish (20-350 sows) • 3 breed-wean (320-2400 sows) • 6 vacant pig sites • Currently – 18 sites enrolled ISU College of Veterinary Medicine, Food Supply Veterinary Services
Swine Premises in Iowa County ISU College of Veterinary Medicine, Food Supply Veterinary Services
Surrounding Counties • Represents 20,000 head • Source: Honeyman M., Duffy M. Iowa State University Animal Industry Report 2006 Iowa’s Changing Swine Industry. A.S. Leaflet R2158 ISU College of Veterinary Medicine, Food Supply Veterinary Services
Methods • Enroll producers by obtaining production information for each site – Sign agreements to share information w/ hold harmless clause • Initial PRRS testing of each site – by serum (PCR and ELISA) – Diagnostics preformed at ISU VDL • Complete PADRAP for each site • Routine testing of sites – by serum and oral fluids • Sample sites with active PRRS infections to characterize strain to learn about potential area spread • Map location and type of production sites in project area • Herd Plans – control or eliminate PRRS virus from site ISU College of Veterinary Medicine, Food Supply Veterinary Services
Herd Veterinarians • Each site will designate their own vet • Vets responsible for – Developing herd plan with producers – Conduct PADRAP analyses – Routine sampling of sites ISU College of Veterinary Medicine, Food Supply Veterinary Services
Timeline of Progress • August 3, 2010 – First Producer Meeting • August 18, 2010 – PADRAP Training for Iowa Co. Vets • September 9, 2010 – Second Producer Meeting • September 15, 2010 – First site enrolled • December 13, 2010 – Third Producer Meeting • January 20, 2011 – PADRAP survey breeding herds ISU College of Veterinary Medicine, Food Supply Veterinary Services
Timeline of Progress • On-going efforts – Sites continuing to be enrolled – First test round for site status of enrolled – Evaluation of obtained data on incidence and virus diversity – Refinement of enrollment processes based on experiences in past 6 months ISU College of Veterinary Medicine, Food Supply Veterinary Services
18 sites enrolled Number of sites enrolled and herd size as of March 1, 2011 Sow Herd Size Production < 150 151-500 501-1500 1500-2400 >2400 Unknown Farrow-to-wean 1 1 1 Farrow-to-finish 2 4 Herd Size < 500 501-1200 1201-2400 2401-4800 >4800 Unknown Nursery 1 1 2 Wean-to-finish 1 1 Finisher 2 1 ISU College of Veterinary Medicine, Food Supply Veterinary Services
Results of Routine Testing Sero-status as of March 1, 2011 Sero-status (ELISA or PCR) Production Negative Positive Positive by Unknown Vaccine 1 1 1** Farrow-to-wean 5 1 Farrow-to-finish 2 1 Nursery Wean-to-finish 1 1* Finisher 1 2 *Vaccinated with MLV PRRS vaccine at arrival to nursery **Sows vaccinated with PRRS ATP and weaned pigs are PCR negative ISU College of Veterinary Medicine, Food Supply Veterinary Services
Challenges • Relatively dense pig area with sizable percentage of nursery-finish or wean finish facilities – Significant movement of non-locally pigs – Variety of sources for weaned pigs • Producer recruitment – issues – Agreement on Hold Harmless document – Confidentiality vs. public information for data – Attendance at meetings • Funding ISU College of Veterinary Medicine, Food Supply Veterinary Services
2 Big Opportunities 1. Collaborate – ELIMINATE virus from individual sites & – BIOSE BIOSECUR CURIT ITY t Y to keep it cont o keep it contained/out! ained/out! • Improve bio-exclusion – keep virus out • Improve bio-management – control spread within site • Practice bio-containment – if present keep virus within • AASV’s PADRAP – uniform risk evaluations – find holes! 2. Learn – Limits to area spread – factors to consider? – Importance of source herd status on area spread? – Can we learn to manage it better? ISU College of Veterinary Medicine, Food Supply Veterinary Services
Acknowledgements • Iowa Pork Producers Association • PIC • PRRS CAP, USDA NIFA Award 2008-55620-19132 • Boehringer Ingelheim Vetmedica Inc. ISU College of Veterinary Medicine, Food Supply Veterinary Services
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