Sustained transmission of dengue virus type 1 in the Pacific due to repeated introductions of different Asian strains

Atchareeya A-Nuegoonpipat (1) , Alain Berlioz-Arthaud (2) , Vincent Chow (3) , Tim Endy (4) , Kym Lowry (5) , Le Quynh Mai (6) , Truong Uyen Ninh (6) , Alyssa Pyke (7) , Mark Reid (8) , Jean-Marc Reynes (9) , Se-Thoe Su Yun (10) , Hlaing Myat Thu (11) , Sook-San Wong (12) , Edward C Holmes (13) , John Aaskov (5)

1 National Institute of Health
2 Institut Pasteur de Nouvelle-Calédonie
3 NUS - National University of Singapore
4 Walter Reed Army Institute of Research
5 QUT - Queensland University of Technology [Brisbane]
6 NIHE - National Institute of Hygiene and Epidemiology [Hanoi, Vietnam]
7 Queensland Health Forensic and Scientific Services
8 Australian Army Malaria Institute
9 Institut Pasteur du Cambodge
10 Singapore General Hospital
11 University of Yangon
12 UM - University of Malaya = Universiti Malaya [Kuala Lumpur, Malaisie]
13 University of Oxford

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.

Mots clés: Dengue viruses; evolution; phylogeny; epidemiology; Asia and the Pacific

Domaines: Maladies infectieuses; Virologie; Santé publique et épidémiologie

Atchareeya A-Nuegoonpipat, Alain Berlioz-Arthaud, Vincent Chow, Tim Endy, Kym Lowry, et al.. Sustained transmission of dengue virus type 1 in the Pacific due to repeated introductions of different Asian strains. Virology, 2004, 329 (2), pp.505 - 512. ⟨10.1016/j.virol.2004.08.029⟩. ⟨pasteur-01836672⟩