Neighbor-joining Phylogenetic tree for partial 5` UTR nucleotide sequence of BVDV- Egypt-020-1ncp (MZ873104) and BVDV-Egypt-020-3ncp (MZ873105). strains compared with other BVDV-1, BVDV-2 and BVDV-3 reference sequence obtained from GenBank database. The scale bar represents the number of substitutions per nucleotide. Egypt-020-1ncp and BVDV-Egypt-020-3ncp strains from the present study are indicated by black circle.