The Swine Health Information Center’s (SHIC) June Domestic Swine Disease Monitoring Report is available.
This month’s Domestic Swine Disease Monitoring Report covers the increased detection of PRRSV lineages 1C.5 and 1C.2. The PRRSV case positivity in wean-to-finish historically decreases in May; however, the positivity remains above 40% this year. In sow farms, the PRRSV case positivity also continues to increase at an alarming rate. PRRSV L1C.5 doubled the number of 2025 detections in a single month in Iowa, Minnesota, South Dakota, and Indiana.