Avipoxvirus Evolution and Phylogenetics in Avian Hosts

Avipoxviruses are large double-stranded DNA viruses within the Poxviridae family that infect domestic and wild bird species across diverse ecosystems. Their genomes, typically between 250 and 350 kilobase pairs, encode conserved central regions responsible for core replication functions and more variable terminal regions that mediate host interaction, virulence and immune evasion. Phylogenetic analyses reveal at least three principal clades (A, B and E) encompassing subclades that often correspond to particular avian orders or geographic regions. Comparative genomics has uncovered extensive gene gain, loss and rearrangement events, suggesting that host switching and local adaptation are central drivers of avipoxvirus diversification. Molecular epidemiology studies in island and continental settings underscore the role of migratory birds and arthropod vectors in long-distance dispersal, while intraspecific variation in viral surface-binding proteins reflects selective pressures imposed by differing host immune repertoires. The global distribution of avipoxvirus lineages carries significant implications for conservation biology, poultry health and the development of viral vectors for vaccines, demanding integrated research on viral ecology, host genetics and environmental change.

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Avipoxvirus Evolution and Phylogenetics in Avian Hosts publication trend

The graph below shows the total number of articles in avipoxvirus evolution and phylogenetics in avian hosts across all publications each year (not limited to Nature Index journals).

Technical terms

Open reading frame (ORF): A continuous stretch of nucleotides in a viral genome predicted to encode a protein.

Phylogenetic clade: A group of viral lineages sharing a common ancestor, identified through sequence comparison and tree building.

Monophyletic: Describes a set of sequences that includes an ancestral lineage and all its descendants.

Synteny: Conservation of gene order and orientation between related genomes, indicative of shared evolutionary history.

Conserved central region: The portion of the poxvirus genome encoding core replication machinery, typically less variable than terminal regions.

References

1. A novel pathogenic avipoxvirus infecting oriental turtle dove (Streptopelia orientalis) in China shows a high genomic and evolutionary proximity with the pigeon avipoxviruses isolated globally. Microbiology Spectrum (2023).
2. Genomic characterization of two novel pathogenic avipoxviruses isolated from pacific shearwaters (Ardenna spp.). BMC Genomics (2017).
3. A Review on the Prevalence of Poxvirus Disease in Free-Living and Captive Wild Birds. Microbiology Research (2021).
4. Avipoxviruses: infection biology and their use as vaccine vectors. Virology Journal (2011).
5. Characterization of Fowlpox virus in chickens and bird-biting mosquitoes: a molecular approach to investigating Avipoxvirus transmission. Journal of General Virology (2019).
6. Genomic Characterisation of a Novel Avipoxvirus Isolated from an Endangered Yellow-Eyed Penguin (Megadyptes antipodes). Viruses (2021).