Molecular epidemiology identifies the expansion of the DENV2 epidemic lineage from the French Caribbean Islands to French Guiana and mainland France, 2023 to 2024

• Published in: Euro surveillance : bulletin européen sur les maladies transmissibles Vol. 29; no. 13
• Main Authors: Klitting, Raphaëlle, Piorkowski, Géraldine, Rousset, Dominique, Cabié, André, Frumence, Etienne, Lagrave, Alisé, Lavergne, Anne, Enfissi, Antoine, dos Santos, George, Fagour, Laurence, Césaire, Raymond, Jaffar-Bandjee, Marie-Christine, Traversier, Nicolas, Gérardin, Patrick, Amaral, Rayane, Fournier, Lucie, Leon, Lucie, Dorléans, Frédérique, Vincent, Muriel, Fontaine, Albin, Failloux, Anna-Bella, Ayhan, Nazli, Pezzi, Laura, Grard, Gilda, Durand, Guillaume André, de Lamballerie, Xavier
• Format: Journal Article
• Language: English
• Published: European Centre for Disease Prevention and Control 28.03.2024
• Subjects: Human health and pathology; Immunology; Infectious diseases; Life Sciences
• ISSN: 1560-7917; 1025-496X
• DOI: 10.2807/1560-7917.ES.2024.29.13.2400123

In 2023, dengue virus serotype 2 (DENV2) affected most French overseas territories. In the French Caribbean Islands, viral circulation continues with > 30,000 suspected infections by March 2024. Genome sequence analysis reveals that the epidemic lineage in the French Caribbean islands has also become established in French Guiana but not Réunion. It has moreover seeded autochthonous circulation events in mainland France. To guide prevention of further inter-territorial spread and DENV introduction in non-endemic settings, continued molecular surveillance and mosquito control are essential.