Evolutionary Dynamics of Human Respiratory Syncytial Virus and Human Metapneumovirus
Author Information
Author(s): Eleanor R. Gaunt, Rogier R. Jansen, Yong Poovorawan, Kate E. Templeton, Geoffrey L. Toms, Peter Simmonds
Primary Institution: Centre for Infectious Diseases, University of Edinburgh, Edinburgh, United Kingdom
Hypothesis
Switching of the predominant circulating subtype of HRSV is brought about by short-lived subtype-specific herd immunity in a population generated over one or two seasons.
Conclusion
The study found that the switching of predominant genetic groups of HRSV and HMPV is due to fluctuating circulation frequencies of pre-existing lineages rather than the emergence of novel lineages.
Supporting Evidence
- Three clades of HRSV and five clades of HMPV were identified that have circulated for decades.
- Positive selection was observed in the G protein of both viruses, indicating immune evasion.
- Switching of predominant genetic groups was not due to the emergence of novel lineages.
Takeaway
This study looked at how two viruses that cause respiratory infections change over time and found that they can switch which type is most common without new types appearing.
Methodology
Phylogenetic analyses were performed on HRSV and HMPV gene sequences to identify clades and model their evolutionary dynamics.
Limitations
The study relied on available sequence data, which may not capture all circulating strains.
Digital Object Identifier (DOI)
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