Bovine Virus Diarrhea Virus Infection in Cattle
Dr. Larry Kerr, Dr. Fred Hopkins, Dr. Matt Welborn
University of Tennessee
Bovine Virus Diarrhea (BVD) was first identified in New York State in 1946. The BVD virus readily mutates producing a number of types, which vary in their ability to produce disease. BVD is spread mainly by calves that were in fected during early pregnancy and not aborted. These animals are referred to as persistently infected or PI calves.