The phylogenetic tree indicated that the p24 fragment of BDV was genetically relative to the S88 strain separated from equine brain tissue in Australian and the H544 strain separated from sheep blood in Germany.

• 从系统发生树图形可以看出,该目的基因片段与澳大利亚马脑组织分离的S88和德国绵羊血液分离的H544病毒株亲缘关系最近。