PRRSV 1-7-4 ORF5 diversity over time

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 is looking at 16 years of genetic diversity of ORF-5 from the PRRS virus sequences submitted by the MSHMP participants

Key Points

  • PRRSV ORF5 sequence monitoring over time contributes to the understanding of pathogen evolution.  
  • Range of PRRSV 1-7-4 percent divergence has decreased over the last 16 years between 2003 and 2019, which is consistent with lineage turnover previously described.
  • PRRSV 1-7-4 can belong to a specific lineage or sublineage, 1A being the most common currently.
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New training videos available: protecting pigs and people from the flu and moving sows

Drs. Jeff Bender and Cesar Corzo collaborated with the Upper Midwest Agricultural Safety and Health Center and the National Pork Board to develop training videos for anyone interacting with pigs.

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Role of stress on early pathogenesis of Senecavirus A in pigs

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. Guilherme Preis, phD candidate with Dr. Fabio Vannucci shares results of his latest research on stress and its influence on Senecavirus A.

Key points

  • Impact of a stress model on the early pathogenesis of Senecavirus A was evaluated.
  • Time to detect replicating virus in snout skins and coronary bands was 48 hours post inoculation.
  • Naïve animals likely do not have enough time to develop vesicles during most transportation events, if exposed via the nasal route.
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Focusing on the grow/finish stages of production to better control PRRS, the new challenge of the swine industry?

Should we redirect our research efforts to focus on PRRS prevention and control in growing and finishing pigs? This was the call for action made by Dr. Montse Torremorell, Associate Professor at the University of Minnesota when she opened the special session “Grow/finish phase of production: What are we learning and implications for making progress on PRRS control.” sponsored by Boehringer Ingelheim during the North American PRRS Symposium this past weekend in Chicago. Torremorell argued that if the swine industry wants to advance regional PRRS control, more emphasis needs to put on preventing and controlling PRRS in growing pigs.

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Influence of pig gut microbiota on Mycoplasma hyopneumoniae susceptibility

In this open-access article from the MycoLab, Dr. Maria Pieters’ team explores the influence of pigs’ gut microbiome in modulating their susceptibility to Mycoplasma hyopneumoniae.

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