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Using PRRSV-Resilient Sows Improve Performance in Endemic Infected Farms with Recurrent Outbreaks.

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Selecting PRRS resilient sows improves disease control and profitability. Resilient sows demonstrate better reproductive performance and lower production costs, leading to higher gross margins for producers.

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Area of Science:

  • Veterinary Science
  • Animal Science
  • Epidemiology

Background:

  • Porcine Reproductive and Respiratory Syndrome (PRRS) poses significant economic challenges to swine production.
  • Selection of PRRS-resilient sows is a proposed strategy for disease control.
  • Understanding the economic impact of resilient versus susceptible sows during PRRSV outbreaks is crucial.

Purpose of the Study:

  • To evaluate the productive performance and economic outcomes of PRRS resilient versus susceptible sows.
  • To model the impact of PRRSV outbreaks (endemic and endemic/epidemic phases) on sow phenotypes.
  • To determine the profitability of selecting PRRSV resilient sows.

Main Methods:

  • A discrete event-based simulation model was developed.
  • Data from a 1500-sow PRRSV-positive farm over three years was used.
  • Simulations modeled four scenarios (Resilient/Endemic, Resilient/Endemic-Epidemic, Susceptible/Endemic, Susceptible/Endemic-Epidemic) over twelve years.

Main Results:

  • Resilient sows generally showed better reproductive parameters in the endemic/epidemic scenario.
  • Piglet production costs were lower for resilient sows, significantly in the endemic/epidemic scenario.
  • Annual gross margin per sow was significantly higher for resilient sows (12% in endemic, 17% in endemic/epidemic).

Conclusions:

  • Selection of PRRSV resilient sows is a profitable strategy for producers.
  • Resilient sows contribute to improved PRRS disease control.
  • This approach enhances overall farm economic viability.