| prevalence of genotypes 1 and 2 of bovine viral diarrhea virus in lower saxony, germany. | the aim of this study was to find whether an antigenic drift had occurred in lower saxony in the past 40 years. for this, the genetic diversity of bovine viral diarrhea virus (bvdv) isolates mainly from lower saxony was estimated by rt-pcr and sequencing of a 420 bp fragment of the e2 glycoprotein gene. sixty-one field virus isolates collected during routine diagnostics between 1960 and 2000 in lower saxony, northern germany, were analyzed. phylogenetic analysis allowed discrimination of genotyp ... | 2001 | 11376844 |