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Regional PRRSv Control Project Iowa County, Iowa · ISU College of Veterinary Medicine, Food Supply...
Transcript of Regional PRRSv Control Project Iowa County, Iowa · ISU College of Veterinary Medicine, Food Supply...
ISU College of Veterinary Medicine, Food Supply Veterinary Services
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
• 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
Working Group Members
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
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
Production
Sow Herd Size
< 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
*Vaccinated with MLV PRRS vaccine at arrival to nursery
**Sows vaccinated with PRRS ATP and weaned pigs are PCR negative
Sero-status as of March 1, 2011
Production
Sero-status (ELISA or PCR)
Negative Positive Positive by Vaccine
Unknown
Farrow-to-wean 1 1 1**
Farrow-to-finish 5 1
Nursery 2 1
Wean-to-finish 1 1*
Finisher 1 2
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
&
– BIOSECURITY to keep it contained/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?