Swine in Minnesota

Stopping the next outbreak: Identifying airborne swine viruses

A single particle of porcine reproductive and respiratory syndrome virus (PRRSV) is about 1,000 times smaller than the width of a strand of hair. It’s easy for the microscopic germs to move undetected through vast amounts of air, meaning costly viruses that infect swine are exceedingly difficult to detect.

PRRSV alone costs United States producers around $1.2 billion every year. Several swine diseases—including the influenza virus—can also transmit to humans.

“Stronger Biosecurity with Viability PCR” a podcast with Dr. Declan Schroeder

UMN Swine Group member Dr. Declan Schroeder was recently on Swine It podcast to explains how viability PCR improves virus detection in swine systems. He discusses how this molecular approach distinguishes intact virus particles from residual genetic material, helping evaluate biosecurity risks, feed contamination, and mitigation strategies. Dr. Schroeder also highlights how the method supports better decision-making in disease prevention.

Dr. Declan Schroeder is a Professor of Virology in the Department of Veterinary Population Medicine at the University of Minnesota. His research focuses on molecular virology, genomics, and virus detection across animal and environmental systems, including swine health challenges such as PRRSV, PEDV, and influenza. His work explores advanced diagnostic tools that improve virus detection and biosecurity decision-making in production systems.

Less Invasive Sampling Methods for PRRSV Detection in Exposed Gilts

Today, we are sharing a very recent publication from Dr. Mariana Kikuti in collaboration with the MSHMP team. Their project looked at the sensitivity of blood-soaked filter papers, blood-soaked swabs, oral swabs and tonsil oral scrubbings when compared to serum samples to detect PRRSV. The full manuscript is available in open-access on the journal’s website.

Evaluating cardiac puncture blood collection as a reliable and biosecure postmortem diagnostic tool in swine

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.

MSHMP researchers Claudio Marcello Melini, Mariana Kikuti, Xiaomei Yue, and Cesar A. Corzo take a look at cardiac puncture, an alternative tool for blood collection during outbreak investigations.

Swine & U: Springtime manure application is just around the corner

By Diane DeWitte, UMN Extension swine educator for The LAND

Maybe your manure plan involves fall application, but as the soils thaw and the tiles begin to run, it’s a good idea to review a few environmental protection habits which will help keep nutrients where they belong.

University of Minnesota Extension provides good resources for nutrient application calculation and groundwater and shoreland protection at its manure management website. Extension manure management specialist, Melissa Wilson, and manure management crops educator Chryseis Modderman provide the latest best management practices for manure application in our Land of Ten Thousand Lakes and Nine Million Pigs.