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

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

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?

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.