The control and elimination of porcine reproductive and respiratory syndrome virus
(PRRSV) represents one of the most challenging tasks facing the swine industry world-
wide. Several factors related to the biology of the virus make disease detection and elimination
difficult. Efforts are further hampered by a lack of vaccines that can protect naïve
herds from infection. With this in mind, elimination efforts that incorporate existing
tools and knowledge are being initiated. The principal focus is at the region level. One
example of success is the Stevens County project in Minnesota, which has attained a
PRRSV-negative status and has been expanded to include all of northern Minnesota.
