MINNESOTA VOLUNTARY PRRS ELIMINATION PROJECT. Pork Lenders Meeting July 29, 2011 Dave Wright, D.V.M.

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1 MINNESOTA VOLUNTARY PRRS ELIMINATION PROJECT Pork Lenders Meeting July 29, 2011 Dave Wright, D.V.M.

2 Coordinator Minnesota Voluntary Regional PRRS Elimination Project N212

3 Funding USDA APHIS PRRS CAP AASV NPB and MPB BI PRRS Initiative Swine Disease Eradication Center-U of M

4 Plan for Today PRRS Review Crash Course What makes it so tough to control? Cost of PRRS Options for Control Voluntary Regional PRRS Elimination Project Message Points for Lenders

5 CRASH COURSE ON PRRS Porcine Reproductive and Respiratory Syndrome

6 PRRS SURVIVABILITY STUDIES Studies Condition Frozen Moist, Cold, Wet Length of Survival Years 11 days 70 0 F (21 0 C) 6 days F (37 o C) 24 hours 132 o F (56 o C) 20 minutes Pitkin, Otake, Dee, Biosecurity protocols for the prevention of spread of PRRSv, Swine Disease Eradication Center, University of Minnesota

7 Highly infectious-only small amount of virus necessary to infect a herd Persistent infection up to 200 days in some pigs--shedders Mutates easily-makes commercial vaccines effective inconsistently Simple blood tests cannot differentiate between field strain and vaccine strain of virus

8 Some good news: PRRSv only infects pigs no other species can be infected

9 FINANCIAL IMPACT OF PRRS U.S. SWINE INDUSTRY $560 TO $760 MILLION --Neumann, JAVMA,

10 FINANCIAL IMPACT OF PRRS $225 to $300 Per Sow-Acute Infection Over $100,000 per outbreak on 500 sow unit --Holck, Polson, 2009 PRRS Compendium

11 FINANCIAL IMPACT OF PRRS Breeding/Farrowing: $74.16 per litter Reduction in pigs weaned & Reduced Farrowing Rate Nursery: $6.01 per pig Increased Mortality; Reduced Feed Conversion; Reduced Average Daily Gain Grow/Finish: $7.67 per pig Increased Mortality; Reduced Feed Conversion; Reduced Average Daily Gain --Neumann, JAVMA,

12 Impact: Change in nursery mortality pre- and postfiltration of study herds-scott Dee Study Pre-filtration (PRRSV+) Flow 1 8.3% Post-filtration (PRRSV-) Flow 1 2.6% Flow % Flow 2 1.9% Flow % Flow 3 1.6%

13 PRRS INTERVENTION STRATEGY WITHIN HERD WITHIN AREA Stabilization Elimination Eradication Control Elimination Eradication

14 INTENSIFY BIOSECURITY

15 OPTIONS FOR MANAGING HERD OUTBREAKS CONTROL THE IMPACT Live with it, but limit losses ELIMINATION OF THE VIRUS FROM HERD

16 PRRS ELIMINATION TOOLS Whole Herd Depopulation and Repopulation Test and Removal All-in/All-out Pig Flow (AIAO) Herd stabilization: Load, Close, Expose Gilt acclimatization Partial Depopulation Herd Closure and Rollover

17 PARTIAL BUDGET ANALYSIS Depopulation with Breeding Project Depopulation with No Breeding Project Closure of Herd with Off-Site Breeding Project Closure of Herd with Off-Site Gilt Development Unit Closure of Herd Alone -Paul Yeske, Swine Vet Center

18 INCIDENCE OF NEW INFECTIONS Depends on pig density in an area

19 Hog-Dense Area Clean pigs flowing to a hog-dense area will break with PRRS approximately 50% of the time. --Tim Loula, National Hog Farmer

20 Hog-Dense Area PRRS struck four times in four years (2004 to 2007) in Wakefield Pork, Inc. case reported in National Hog Farmer. --National Hog Farmer

21 SOW FILTRATION STUDY Scott Dee Identified 20 herds for his study that became infected every 12.8 to 13.1 months.

22 Regional PRRS Elimination Project North of 212 MN Montse Torremorell, Dave Wright, Scott Dee, Peter Davies, Bob Morrison, & Swine Health Center, Morris Vet Clinic, Nate Winkelman, Swine Vet Center, Neil DeBuse, Fairmont Vet Clinic University of Minnesota, St. Paul, MN USA

23 REGIONAL PRRS ELIMINATION PROJECT A voluntary, producer-led, coordinated, regional disease control program

24 BACKGROUND Stevens County regional elimination project started in 2004 Project expanded to 6 surrounding counties in 2009 In 2010, project expanded again to include the greater region of N-212

25 Expansion

26 GOALS OF REGIONAL ELIMINATION PROJECT Identify the swine herds in the area Invite participation by signing participation agreement Determine PRRS status of each herd Encourage elimination if herd is positive Encourage improved biosecutiry if herd is negative

27 Note the verbs Invite and Program is voluntary Encourage Relies on producer and veterinarian participation and communication Communication is key

28 Stevens County 2004

29 Stevens Co., May, 2011

30 Seven County Region

31 May 2011 Maps

32 PLEASED WITH PROGRESS More sites have been identified N212 MN sow herd status Fewer positive sites in region reduced prevalence of PRRS Q Q Q Q Q2 Negative Negative provisional Positive stable Positive Unknown Demonstrates the advantage of cooperative effort among producers, veterinarians, community suppliers and industry to eliminate PRRS

33 2011

34 STUDIES UNDERWAY TO CALCULATE BENEFIT OF REGIONAL ELIMINATION PROJECTS Presentations at Lehman Conference

35 HOW PORK LENDERS CAN BECOME INVOLVED

36 DISCUSS PRRS WITH CUSTOMERS Inquire about risk and management of PRRS on farms that you serve

37 ENCOURAGE MULTI-SITE PRODUCTION IF EXPANDING DISCOURAGE CONTINUOUS FLOW IF EXPANDING

38 If producer is planning to expand, consider PRRS elimination as well.

39 INVEST IN BIOSECURITY

40 Bench Danish Entry Bench

41 Dedicated Trailers

42 Clean-up Equipment

43 Establish Clean/Dirty Line for Transport on Farms

44 EXPANDED FEED STORAGE Minimum one-week supply to allow flexible, non-emergency delivery

45 Air filtration in studs and sow farms 2009

46 Air filtration Dee, 2005 MERV 16 (EU 9) 95 % 0.3 microns

47 SUMMARY PRRS is a nasty bug It s really costly We have tools to control and eliminate it from herds and regions Voluntary regional elimination projects show promise for assisting swine producers in managing PRRS

48 THANKS FOR THE INVITATION MN Pork Board MN Pork Producers Association

49 Dave Wright, D.V.M