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. 2014 Jun;20(6):1034-6.
doi: 10.3201/eid2006.131413.

Dengue virus type 3, South Pacific Islands, 2013

Dengue virus type 3, South Pacific Islands, 2013

Van-Mai Cao-Lormeau et al. Emerg Infect Dis. 2014 Jun.

Abstract

After an 18-year absence, dengue virus serotype 3 reemerged in the South Pacific Islands in 2013. Outbreaks in western (Solomon Islands) and eastern (French Polynesia) regions were caused by different genotypes. This finding suggested that immunity against dengue virus serotype, rather than virus genotype, was the principal determinant of reemergence.

Keywords: French Polynesia; Solomon Islands; South Pacific Islands; dengue; dengue virus; dengue virus type 3; genotype; phylogenetics; serotype; viruses.

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Figures

Figure 1
Figure 1
South Pacific Region showing the study areas (Solomon Islands and French Polynesia) tested for dengue virus type 3.
Figure 2
Figure 2
Evolutionary relationships of 54 dengue virus type 3 (DENV-3) gene sequences. The phylogenetic tree was obtained by using the maximum-likelihood method based on the Kimura 2-parameter model and MEGA 5 software (http://www.megasoftware.net/). The percentage of replicate trees in which the associated taxa clustered together in the bootstrap test (1,000 replicates) is shown for values >90. Each strain is labeled by country of origin/strain name/GenBank accession number (if available). Black diamonds indicate DENV-3 strains sequenced in this study that were isolated during the DENV-3 epidemic in the Solomon Islands in 2013. Black triangles indicate DENV-3 strains sequenced in this study that were isolated during the DENV-3 epidemic in French Polynesia in 2013. Genotypes are indicated on the right side of the tree. Scale bar indicates nucleotide substitutions per site.

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