Molecular and evolutionary analysis of dengue virus serotype 2 isolates from Korean travelers in 2015

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Title
Molecular and evolutionary analysis of dengue virus serotype 2 isolates from Korean travelers in 2015
Author(s)
Eun Ha Hwang; Green Kim; Hanseul OhYou Jung An; J Kim; J H Kim; E S Hwang; J H Park; Jung Joo HongBon Sang Koo
Bibliographic Citation
Archives of Virology, vol. 165, no. 8, pp. 1739-1748
Publication Year
2020
Abstract
In Korea, dengue infection has been frequently reported in travelers to tropical and subtropical countries. Global warming increases the probability of autochthonous dengue outbreaks in Korea. In this report, the molecular and evolutionary properties of four dengue virus (DENV) type 2 isolates from Korean overseas travelers were examined. Three of these isolates were classified as Cosmopolitan genotypes and further divided into sublineages 1 (43,253, 43,254) and 2 (43,248), while the other isolate (KBPV-VR29) was related to American genotypes. The variable amino acid motifs related to virulence and replication were identified in the structural and non-structural proteins. A negative selection mechanism was clearly verified in all of the DENV proteins. Potential recombination events were identified in the NS5 protein of the XSBN10 strain. The substitution rate (5.32 × 10-4 substitutions per site) and the time of the most recent common ancestor (TMRCA) for each evolutionary group were determined by the Bayesian skyline coalescent method. This study shows that DENV type 2 strains with distinct phylogenetic, evolutionary, and virulence characteristics have been introduced into Korea by overseas travelers and have the potential to trigger autochthonous dengue outbreaks.
ISSN
0304-8608
Publisher
Springer
DOI
http://dx.doi.org/10.1007/s00705-020-04653-z
Type
Article
Appears in Collections:
Ochang Branch Institute > Division of Bioinfrastructure > National Primate Research Center > 1. Journal Articles
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