Sciensano, Unit Exotic and Vector Borne Diseases (ExoVec), Groesselenberg 99, B-2800 Ukkel, Belgium.
Viruses. 2023 Jun 28;15(7):1471. doi: 10.3390/v15071471.
is a poxvirus from the genus that mainly affects bovines and it causes severe economic losses to livestock holders. The is currently dispersing in Asia, but little is known about detailed phylogenetic relations between the strains and genome evolution. We reconstructed a whole-genome-sequence (WGS)-based phylogeny and compared it with single-gene-based phylogenies. To study population and spatiotemporal patterns in greater detail, we reconstructed networks. We determined that there are strains from multiple clades within the previously defined cluster 1.2 that correspond with recorded outbreaks across Eurasia and South Asia (Indian subcontinent), while strains from cluster 2.5 spread in Southeast Asia. We concluded that using only a single gene (cheap, fast and easy to routinely use) for sequencing lacks phylogenetic and spatiotemporal resolution and we recommend to create at least one WGS whenever possible. We also found that there are three gene regions, highly variable, across the genome of LSDV. These gene regions are located in the 5' and 3' flanking regions of the LSDV genome and they encode genes that are involved in immune evasion strategies of the virus. These may provide a starting point to further investigate the evolution of the virus.
是一种痘病毒属病毒,主要感染牛,给牲畜饲养者造成严重的经济损失。目前正在亚洲传播,但对株系之间的详细系统发育关系和基因组进化知之甚少。我们重建了基于全基因组序列(WGS)的系统发育关系,并将其与基于单基因的系统发育关系进行了比较。为了更详细地研究种群和时空模式,我们重建了网络。我们确定在之前定义的 1.2 簇内有来自多个进化枝的毒株,这些毒株与欧亚大陆和南亚(印度次大陆)的记录疫情相对应,而来自簇 2.5 的毒株在东南亚传播。我们得出结论,仅使用单个基因(便宜、快速且易于常规使用)进行测序缺乏系统发育和时空分辨率,我们建议尽可能创建至少一个 WGS。我们还发现 LSDV 基因组中有三个高度可变的基因区域。这些基因区域位于 LSDV 基因组的 5'和 3'侧翼区,它们编码参与病毒免疫逃逸策略的基因。这些可能为进一步研究病毒的进化提供了一个起点。