SHIC Funded MSHMP Annual Report Details Program Growth and Value to US Pork Producers

The Morrison Swine Health Monitoring Project, funded by the Swine Health Information Center, submitted its 2025 annual report for swine disease monitoring and project enhancements. Dr. Cesar Corzo, along with colleagues at the University of Minnesota, detail the outcomes from three project objectives for the past year. Key achievements include adding porcine deltacoronavirus to the list of monitored diseases, assessing requirements to include influenza A virus sequencing information for breeding herds, and supporting the dynamic porcine reproductive and respiratory syndrome virus variant classification system that serves as the basis for the PRRSV Variants Under Monitoring report. Further, project leaders report the continued expansion of producer participation in alignment with increasing inclusivity and representativeness. The MSHMP project data currently accounts for 3.9 million sows and represents approximately 65% of the US breeding herd.

Read the full MSHMP report here.

For 2025, the MSHMP project encompassed three main objectives, including 1) monitoring trends in pathogen incidence and prevalence for PRRSV, PEDV, PDCoV, and Senecavirus A, 2) prospective monitoring of PRRSV sequence evolution and impact, and 3) expanding participation in the voluntary program. Progress was reported on all three objectives.

In the report, Dr. Corzo and colleagues note that the PEDV cumulative incidence trend was different for 2025 when compared to previous years and that a sharp increase was observed during the fall and into the winter months. New to the MSHMP project was the addition of PDCoV to the list of monitored diseases, increasing its impact and value to the industry.

The MSHMP team also explored and developed a method to estimate the breeding herd IAV cumulative incidence in 2025, broadening the program’s deliverables to the US swine industry. While MSHMP confirmed it is possible to estimate cumulative IAV incidence based on veterinary diagnostic lab PCR data, more work needs to be performed to avoid potential underestimation of this metric. Overall, the IAV cumulative incidence ranged between 1% and 5% over the past 10 years.