Reduction of wild-type PRRS virus shedding in aerosol of growing pigs by modified-live virus vaccination at weaning

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Country: United States
Source: 2013 Allen D. Leman Swine Conference

Key points:

  • The objective of this study was to quantify the effect of MLV vaccine on performance and measure wild-type virus shedding to sentinels and in aerosol.
     
  • The duration and frequency of PRRSV RNA detection in air was significantly higher in non-vaccinated controls than in the group vaccinated with Ingelvac PRRS MLV.
     
  • The observed performance benefits as well as shedding reduction in vaccinated pigs challenged with wild-type virus support the recommendation of MLV vaccination of growing pigs at risk of infection.