#04-200

Complete

Date Full Report Received

06/30/2008

Date Abstract Report Received

06/30/2008

Investigation

Institution: ,
Primary Investigator:

PRRS virus can be eradicated using direct virus exposure and herd closure of at least 200 days. • This can be done in a cost effective manner with the only additional cost is renting a site to hold gilts for the direct virus exposure and the cost of transportation to get the gilts back to the farm. • There is no need to have any loss of production with this method of virus eradication. • It is possible to bring negative naive gilts into these herds and they will remain negative for at least 6 months. Piglets from these farms will be negative as well. Unfortunately herds can become reinfected with a new strain following the eradication. However these same viruses may have entered the herd even if they were still positive and more than likely made a more difficult situation to manage having multiple viruses in the herd at the same time.