USDA’s Ag Research Service is working to combat major diseases in the dairy industry. One of the most challenging has been Bovine Viral Diarrhea (BVD). The disease has typically been battled by vaccinations, but as we learn from Julia Ridpath, a microbioligist with ARS, this strategy isn’t as effective as it could be due to persistently infected animals. Past-President of the National Association of Farm Broadcasting Joe Cornely has the details here: Julia Ridpath on BVD (2:59 mp3)