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Population dynamics of flaviviruses revealed by molecular phylogenies.
Author(s) -
Paolo Marinho de Andrade Zanotto,
Ernest A. Gould,
George F. Gao,
Paul Harvey,
Edward C. Holmes
Publication year - 1996
Publication title -
proceedings of the national academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.011
H-Index - 771
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.93.2.548
Subject(s) - biology , phylogenetic tree , biological dispersal , evolutionary biology , phylogenetics , viral phylodynamics , population , genetics , virology , gene , demography , sociology
The phylogeny of 123 complete envelope gene sequences was reconstructed in order to understand the evolution of tick- and mosquito-borne flaviviruses. An analysis of phylogenetic tree structure reveals a continual and asymmetric branching process in the tick-borne flaviviruses, compared with an explosive radiation in the last 200 years in viruses transmitted by mosquitoes. The distinction between these two viral groups probably reflects differences in modes of dispersal, propagation, and changes in the size of host populations. The most serious implication of this work is that growing human populations are being exposed to an expanding range of increasingly diverse viral strains.

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