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Influence of porcine circovirus type 2 vaccination on the probability and severity of pneumonia detected postmortem
  1. J. Raith, MVM1,
  2. S. Kuchling, MSc2,
  3. C. Schleicher, MSc2,
  4. H. Schobesberger, DVM1 and
  5. J. Köfer, DVM, Professor1
  1. 1Institute for Veterinary Public Health, University of Veterinary Medicine Vienna, Veterinaerplatz 1, Vienna A-1210, Austria
  2. 2Division for Data, Statistics & Risk Assessment, Austrian Agency for Health and Food Safety, Zinzendorfgasse 27/1, Graz A-8010, Austria
  1. E-mail for correspondence: johannes.raith{at}vetmeduni.ac.at

Abstract

To evaluate the influence of porcine circovirus type 2 vaccination (PCV-2) on the probability and severity of pneumonia, postmortem findings of 247,505 pigs slaughtered between 2008 and 2011 were analysed by applying a cumulative link mixed model. Three major effects could be observed: (1) PCV-2 vaccination significantly (P<0.01) reduced the odds (coefficient: −0.05) of postmortem findings of mild, moderate and severe pneumonia for vaccinated pigs. (2) Pigs from fattening farms were less likely (coefficient: −0.44; P<0.05) to exhibit signs of pneumonia at slaughter than pigs from farrow-to-finish farms. (3) When vaccinated, the odds of detecting postmortem signs showed an even more pronounced reduction (coefficient: −0.19; P<0.001) for pigs from fattening farms. Combining PCV-2 vaccination, farm type and interaction effects between these two factors, a pig vaccinated against PCV-2 from a fattening farm had only half the chance (OR 0.51) of pneumonia being detected at postmortem than a non-vaccinated pig from a farrow-to-finish farm. The study demonstrates the benefit of a vaccination programme against PCV-2 as an important tool to reduce the risk of postmortem pneumonia findings and the severity of pneumonia in pigs at slaughter.

  • pig health
  • Porcine circovirus type 2
  • vaccination
  • slaughter findings
  • Pneumonia
  • cumulative link mixed models (CLMM)

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