Comparative efficacy evaluation of two modified-live PRRS vaccines against a heterologous PRRSV 1-7-4 challenge

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Country: United States
Source: 2021 AASV Annual Meeting
Challenge strain(s): Field isolate RFLP 1-7-4

Key points:

  • The objective of this study was to evaluate the efficacy of Ingelvac PRRS MLV, Prevacent PRRS and a novel experimental PRRSV MLV vaccine in a pig respiratory challenge model.
     
  • Ingelvac PRRS MLV group demonstrated a significant improvement in ADWG and reduction in the level of viremia compared to both the Prevacent PRRS and non-vaccinated control groups during the post-challenge period.