Molecular epidemiology and evolutionary characteristics of dengue virus 2 in East Africa
2024; Nature Portfolio; Volume: 15; Issue: 1 Linguagem: Inglês
10.1038/s41467-024-51018-0
ISSN2041-1723
AutoresSindiso Nyathi, Izabela Maurício de Rezende, Katharine S. Walter, Panpim Thongsripong, Francis Mutuku, Bryson A. Ndenga, Joel Omari Mbakaya, Peter Aswani, Peter Siema Musunzaji, Philip K. Chebii, Priscilla Maina, Paul S. Mutuku, Charles M. Ng’ang’a, Said L. Malumbo, Zainab Jembe, David M. Vu, Erin A. Mordecai, Shannon N. Bennett, Jason R. Andrews, A. Desirée LaBeaud,
Tópico(s)Zoonotic diseases and public health
ResumoDespite the increasing burden of dengue, the regional emergence of the virus in Kenya has not been examined. This study investigates the genetic structure and regional spread of dengue virus-2 in Kenya. Viral RNA from acutely ill patients in Kenya was enriched and sequenced. Six new dengue-2 genomes were combined with 349 publicly available genomes and phylogenies used to infer gene flow between Kenya and other countries. Analyses indicate two dengue-2 Cosmopolitan genotype lineages circulating in Kenya, linked to recent outbreaks in coastal Kenya and Burkina Faso. Lineages circulating in Western, Southern, and Eastern Africa exhibiting similar evolutionary features are also reported. Phylogeography suggests importation of dengue-2 into Kenya from East and Southeast Asia and bidirectional geneflow. Additional lineages circulating in Africa are also imported from East and Southeast Asia. These findings underscore how intermittent importations from East and Southeast Asia drive dengue-2 circulation in Kenya and Africa more broadly.
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