Key characteristics of BVD virus - Volker Moennig (BVDzero)

The BVD pestivirus is divided into two genotypes (type 1 and type 2), on the basis of genetic differences, and into two biotypes (non-cytopathic and cytopathic), based on effects on cultured cells. BVD virus has a broad host spectrum and is generally well adapted to the bovine host species where it causes mild disease. Highly virulent BVD variants (mainly type 2) may however emerge.