Sustained transmission of dengue virus type 1 in the Pacific due to repeated introductions of different Asian strains.
Outbreaks of dengue due to dengue virus type 1 (DENV-1) occurred almost simultaneously in 2001 in Myanmar and at multiple sites almost 10,000 km away in the Pacific. Phylogenetic analyses of the E protein genes of DENV-1 strains recovered from Asia and the Pacific revealed three major viral genotypes (I, II, and III) with distinct clades within each. The majority of strains from the Pacific and Myanmar, and a number of other Asian strains fell into genotype I. Genotype II comprised a smaller set of Asian and Pacific strains, while genotype III contained viruses from diverse geographical localities. These analyses suggested that the continuing outbreak of dengue in the Pacific has been due to multiple, direct, introductions of dengue viruses from a variety of locations in Asia followed by local transmission. There was no evidence that the introduction of these viruses into the Pacific was associated with any adaptive changes in the E protein of the viruses.
A-Nuegoonpipat
Atchareeya
A
National Institute of Health, Department of Medical Science, Bangkok, Thailand.
Berlioz-Arthaud
Alain
A
Chow
Vincent
V
Endy
Tim
T
Lowry
Kym
K
Mai
Le Quynh
le Q
Ninh
Truong Uyen
TU
Pyke
Alyssa
A
Reid
Mark
M
Reynes
Jean-Marc
JM
Su Yun
Se-Thoe
ST
Thu
Hlaing Myat
HM
Wong
Sook-San
SS
Holmes
Edward C
EC
Aaskov
John
J
D000818:Animals; D001208:Asia / Q000453:epidemiology; D003715:Dengue / Q000453:epidemiology* / Q000635:transmission*; D003716:Dengue Virus / Q000235:genetics*; D004196:Disease Outbreaks; D005367:Fiji / Q000453:epidemiology; D005838:Genotype; D006801:Humans; D017720:Molecular Epidemiology; D009510:New Caledonia / Q000453:epidemiology; D010802:Phylogeny; D014759:Viral Envelope Proteins / Q000235:genetics
D014759:Viral Envelope Proteins