outbreak – Swine in Minnesota

A Review of MSHMP PED Chart 3: PED Outbreak History

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.

During the 2016-17 MSHMP year, we introduced a graph, PED Chart 3, in response to the recurring question of if farms that break with PED had repeating histories of infection. The horizontal axis is shown at the top and indicates the number of farms that have broken in the current MSHMP season. New farms are added throughout the year as they break. On the vertical axis we list each of these farms’ PED historical number of breaks in past seasons. Outbreaks are colored in blue, a darker tone indicates that a farm has had more than one outbreak within the year, and grey indicates a lack of historical data (Figure 1).

Chasing a moving target

Rapid evolution, molecular surveillance of porcine reproductive and respiratory syndrome virus.

By Kim VanderWaal, Nakarin Pamornchainavakul, Cesar A. Corzo, Mariana Kikuti, Albert Rovira and Igor Paploski, University of Minnesota

When talking to practitioners, they will tell you that porcine reproductive and respiratory syndrome control feels like a moving target. Despite ever-growing investments aimed at preventing between-farm spread, PRRS incidence at the national scale remains relatively steady year-over-year. However, underneath this apparent steady-state, epidemic-like spread events occur every few years with the emergence of novel genetic variants (Figure 1). For instance, the Lineage 1A 1-7-4 virus (blue line) emerged in ~2014 and rapidly spread throughout the country.

Summary: Streptococcus equi subspecies zooepidemicus – a case report of sudden death in a German sow farm

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.

Researchers Lukas Geiping, Henrik Detlefsen, Sara Trittmacher, Christoph Georg Baums, René Bergmann, and Isabel Hennig-Pauka share a case report of a Streptococcus equi subspecies zooepidemicus outbreak.

When the farm is exposed to a critical level of PRRSv in air, the probability of having an outbreak is four times higher for non-filtered farms: A retrospective analysis using wind data

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.

Researchers Kaushi Kanankege, Seunghyun Lim, and Andres Perez at the University of Minnesota examine wind data and find that farms exposed to a critical level of PRRSv in the air are four times more likely to have an outbreak if they do not have air filtration.

Description of a new clade within subtype 1 of Betaarterivirus suid 1 (PRRSV1) causing severe outbreaks in Spain

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.

In this week’s Science Page learn more about a new PRRSV clade causing severe outbreaks in Spain, from Martí Cortey, Gerard E. Martín-Valls and Enric Mateu of Universitat Autònoma de Barcelona.