Evolution of H1N1 Influenza A Virus
Author Information
Author(s): Martha I. Nelson, Cécile Viboud, Lone Simonsen, Ryan T. Bennett, Sara B. Griesemer, Kirsten St. George, Jill Taylor, David J. Spiro, Naomi A. Sengamalay, Elodie Ghedin, Jeffery K. Taubenberger, Edward C. Holmes
Primary Institution: The Pennsylvania State University
Hypothesis
How has the H1N1 influenza A virus evolved since 1918, particularly in relation to reassortment events?
Conclusion
The study shows that segmental reassortment has significantly influenced the genomic evolution of H1N1 influenza A virus since 1918.
Supporting Evidence
- Segmental reassortment has played an important role in the genomic evolution of A/H1N1 since 1918.
- Two significant reassortment events were associated with the severe epidemics of 1947 and 1951.
- The 1947 epidemic virus was closely related to clade D viruses across all genome segments.
- Clade E viruses, associated with the 1951 epidemic, exhibited significant genetic changes due to reassortment.
Takeaway
Scientists studied the H1N1 virus from 1918 to 2006 and found that it changed a lot by mixing its genes with other viruses, which helped it survive and cause epidemics.
Methodology
Phylogenetic analysis of 71 complete genome sequences of H1N1 influenza A virus sampled globally from 1918 to 2006.
Limitations
The study is limited by the availability of historical viral sequences, particularly from the 1930s to 1950s.
Digital Object Identifier (DOI)
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