Key result
Phylogenetic analysis of 516 ASFV sequences based on a 205 bp p72 gene fragment identified 44 genotypes and divided African ASFV populations into four spatial clades.
A novel phylogenetic analysis based on a partial p72 fragment can identify ASFV genotypes and spatial genetic variation, aiding in viral outbreak origin identification.
May guide regional ASFV surveillance in Africa; leaves open validation of the four clades for control strategies.
African swine fever virus (ASFV) outbreak has been considered as an emerging and re-emerging disease for almost a century. Diagnostically, simple polymerase chain reaction and sequencing-based molecular detection could be employed for both viral identification and genotyping. This study established a novel phylogenetic analysis and epidemiology comparison based on 205 bp of p72 gene sequences. Based on this partial p72 fragment, an updated list of 44 different genotypes from a total of 516 ASFV sequences compiled from GenBank was generated. Nucleotide diversity was 0.04325 ± 0.00231. The analysis of spatial genetic variation divided the ASFV populations of the African continent into four clades (clade A: central and upper eastern Africa; clade B: eastern Africa; clade C: eastern and southern Africa; and clade D: southern Africa). These results and the developed protocol could serve as useful molecular tools for ASFV diagnosis from degraded DNA or putrefied samples, and also provide the phylogeographic perspective to identify the origin of viral outbreaks, facilitating the decision planning to limit their spread.
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Muangkram et al. (2015) studied African swine fever virus (n=516). Phylogenetic analysis based on p72 gene sequences was evaluated on Genotypes and spatial genetic variation. Phylogenetic analysis of 516 ASFV sequences based on a 205 bp p72 gene fragment identified 44 genotypes and divided African ASFV populations into four spatial clades.
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