Peri-domestic entomological surveillance using private traps allows detection of dengue virus in Aedes albopictus during an autochthonous transmission event in mainland France, late summer 2023 - Archive ouverte HAL
Journal Articles Eurosurveillance Year : 2024

Peri-domestic entomological surveillance using private traps allows detection of dengue virus in Aedes albopictus during an autochthonous transmission event in mainland France, late summer 2023

Raphaëlle Klitting
Clémence Galon
  • Function : Author
Violaine Bonnefoux
  • Function : Author
Christophe Bellet
  • Function : Author
Albin Fontaine
Élise Brottet
Marie-Claire Paty
  • Function : Author
Armelle Mercurol
  • Function : Author
Nathalie Ragozin
  • Function : Author
Gilda Grard
Xavier de Lamballerie
  • Function : Author

Abstract

While locally-acquired dengue virus (DENV) human infections occur in mainland France since 2010, data to identify the mosquito species involved and to trace the virus are frequently lacking. Supported by a local network gathering public health agencies and research laboratories, we analysed, in late summer 2023, mosquitoes from privately-owned traps within a French urban neighbourhood affected by a dengue cluster. The cluster, in Auvergne-Rhône-Alpes, comprised three cases, including two autochthonous ones. Upon return from a recent visit to the French Caribbean Islands, the third case had consulted healthcare because of dengue-compatible symptoms, but dengue had not been recognised. For the two autochthonous cases, DENV-specific antibodies in serum or a positive quantitative PCR for DENV confirmed DENV infection. The third case had anti-flavivirus IgMs. No DENV genetic sequences were obtained from affected individuals but Aedes albopictus mosquitoes trapped less than 200 m from the autochthonous cases’ residence contained DENV. Genetic data from the mosquito-derived DENV linked the cluster to the 2023–2024 dengue outbreak in the French Caribbean Islands. This study highlights the importance of raising mosquito-borne disease awareness among healthcare professionals. It demonstrates Ae. albopictus as a DENV vector in mainland France and the value of private mosquito traps for entomo−virological surveillance.
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hal-04691674 , version 1 (10-09-2024)

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Barbara Viginier, Raphaëlle Klitting, Clémence Galon, Violaine Bonnefoux, Christophe Bellet, et al.. Peri-domestic entomological surveillance using private traps allows detection of dengue virus in Aedes albopictus during an autochthonous transmission event in mainland France, late summer 2023. Eurosurveillance, 2024, 29 (36), ⟨10.2807/1560-7917.ES.2024.29.36.2400195⟩. ⟨hal-04691674⟩
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