VSP.LF.DK VSP-INFO@LF.DK PIG RESEARCH CENTRE PRRSV control in Denmark Charlotte Sonne Kristensen Pig...

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PRRSV control in DenmarkCharlotte Sonne Kristensen

Pig Research Centre

Danish Agriculture & Food Council

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Outline

PRRSV in DenmarkPRRSV eradicationMotivation of the farmers

– Production loss– Antibiotic used

Conclusion

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PRRSV in Denmark

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PRRSV in Denmark First diagnose in 1992

MLV Vaccination initiated 1996

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PRRSV vaccination Objective

– to reduce the spread of PRRSV– To concider a national eradication (3 years)

Vaccination– 1000 herds vaccinated (July-December 1996)

– Clinical outbreaks 2-3 month after vacc.– Disease in vaccinated and non-vaccinated neighbours– Vaccination stopped December 1996

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PRRSV today 43% of the herds have a PRRSV declaration

– 73% of the sows– 39% of the finishers

65% of the herds are declared free

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PRRSV eradication

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Eradications 2005-2010

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PRRSV Partial depopulation

– AIAO– Empty stable with continuous flow– Purchase negative breeding animals– Vaccination and quarantine

Large success rate

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We know PRRSV status of almost half the herds Location of all herds Movement of all pigs Size of all herds Age groups represented at each herd How to eradicate PRRSV

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So why not entire Country?

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Who should pay??

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Motivation of the farmers Production loss Antibiotic use

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Production loss ACUTE Weekly production data from 8 herds with

acute outbreak of PRRSV

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Production loss ACUTE

Weaned/litter Liveborne/litter Dead/litter Start/end PRRSV

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Conclusion ACUTE Outbreak 12-60 weeks (average 33 weeks) Loss sow/pen place +€5 to -€100 (average €31)

PRRSV US>PRRSV EU

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Production loss CHRONIC Production data annually collected Merged with SPF status Average on selected production parameters calculated

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2010 2011

-PRRSV +PRRSV -PRRSV +PRRSV

Sows

No herds 361 149 327 124

Borne alive 14,57 14,54 14,84 14,82

Total piglet mortality, % 23,30 23,82 22,48 23,19

Weaners

No herds 295 106 274 101

Mortality, % 2,65 2,88 2,73 3,29

Finishers

No herds 163 88 187 86

Mortality, % 3,68 4,06 3,50 3,75

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Conclusion CHRONIC A little bit on mortality

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Antibiotic use and PRRSV PRRSV prevalence among

– 50 herds with highest antibiotic use– 50 herds with lowest antibiotic use

No difference

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What should motivate? Production loss- acute MAYBEE Production loss- chronic NO Antibiotic use NO

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Difficult to motivate farmers No general coordinated PRRSV control in

Denmark

Besides………………………..

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Challenges Antibiotic use EU Ban on Sow Stalls Feed prices

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Thank you for your attention