Best of Leman 2020: Forecasting PRRSV breaks based on biosecurity risks

This is our most popular series on the blog. Once a month, we are sharing with you a presentation given at the Allen D. Leman swine conference, on topics that the swine group found interesting, innovative or that lead to great discussions.

You can find all of the presentations selected from previous conferences on the blog here.

During the Carlos Pijoan SDEC symposium, Dr. Gustavo Machado shared insights on biosecurity practices at the farm level and the impact they can have on PRRS outbreaks. We hope you enjoy his talk.

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PRRS incidence in status 4 sow farms

This is our Friday rubric: every week a new Science Page from the Bob Morrison’s Swine Health Monitoring Project. The previous editions of the science page are available on our website.

This week, the MSHMP team updates a valuable statistical parameter: the PRRS incidence in status 4 status 4 sow farms. As a reminder, status 4 farms are defined as negative for PRRS in both exposure and shedding status.

Key Points

  • In the last 13 years, on average 9.3% (Range 3.2% – 20.3%) of status 4 farms have had a PRRS outbreak, with an apparent cyclical peak at around 10% every 2-3 years.
  • The cumulative incidence of the current MSHMP year (July 2020 to May 2021) for status 4 farms is 9.9%.
  • PRRS incidence in status 4 farms during the current MSHMP season is not higher than the ones observed in the previous MSHMP seasons.
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Temporal stability of swine movement networks in the U.S.

This is our Friday rubric: every week a new Science Page from the Bob Morrison’s Swine Health Monitoring Project. The previous editions of the science page are available on our website.

This week, Dr. Dennis Makau from the VanderWaal lab is sharing a project on the importance of swine movement to identify farms with a high risk of disease outbreak.

Key Points

  • Animal movement is a key factor in the U.S. swine industry and is an important risk factor for disease transmission
  • Animal movement data combined with social network analysis can inform risk-based surveillance and control
  • Using production system movement data, it was possible to identify the time window of data needed to gauge connectivity and identify high-risk and high-spread farms
  • Using previous data up to two years old is still better than choosing randomly implemented interventions to manage disease spread, especially in cases of outbreaks transmitted via animal movements
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Leman conference: Research abstracts are due July 7th

Submit your research abstract for the Allen D. Leman Swine Conference, September 18-21, 2021.

The hybrid (in-person and virtual) conference will bring science-driven solutions to the complex challenges facing the swine industry. We need your help to fulfill that promise.

Abstracts for posters and oral presentations can be submitted online through July 7, 2021.

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Assessing Senecavirus A shedding and transmission in growing pig populations

This is our Friday rubric: every week a new Science Page from the Bob Morrison’s Swine Health Monitoring Project. The previous editions of the science page are available on our website.

This week, Drs. Preis and Corzo are inviting you to participate in an AASV-funded project regarding the epidemiology of Senecavirus A in growing pigs.

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