Infection Chain Concept - Dr. Brian Payne, Swine Technical Manager, Boehringer Ingelheim, from the 2013 World Pork Expo, June 5 - 7, 2013, Des Moines, IA, USA. More presentations at http://www.swinecast.com/2013-world-pork-expo

1. The Infection Chain™ Concept

2. Piglet Approach System Approach

3. Looking for the root of a problem

4. Chain of the infection in Epidemiology field:
Individual (host)approach
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5. The pig production cycle or “chain”
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6. Production Chain / Infection Chain
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7. “Infection Chain” of swine pathogens
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8. Production flow / infection / prevention
“Chain”
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9. PRRS…the example
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10. Role of Vaccine – Immunity for Control
PRRSv in Growing Pigs
• Vaccine provides protective immunity that can mitigate the
consequences of PRRSv infection
• The common benefit of vaccines is to improve herd health,
which in turn improves economic return
• Meta-Analysis of 16 Modified Live PRRS Vaccination Challenge Studies; M.Roof
et. al., Emerg Swine Dis Symp, 2007
• Growth Performance Improvement and Mortality Reductions Derived from a PRRS
Large-Scale Control Project in the U.S.; J. Angulo, et.al., IPVS, 2012

11. Statement of the Problem:
•PRRS instability in the breeding herd
• Defined as evidence of
PRRSv circulation and
transmission vertically and/or
horizontally
• Can cause reproductive
problems w/ biologic &
economic impact
• Can lead to weaning of
PRRSv positive piglets w/
biologic & economic impact
• PRRSv Control or Elimination;
D.Holtkamp, George Young Conf.,
2012
• Assessment of economic impact of
PRRSv on U.S. pork producers; D.
Holtkamp et.al., JSHAP, 2013

12. Production flow / infection / prevention
“Chain”
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13. Chain Thinking
Production
Chain
Infection
Chain™
Prevention
Chain™
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Chain Thinking