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Variation in the susceptibility of urban Aedes mosquitoes infected with a densovirus

Perrin Aurélie, Gosselin-Grenet Anne-Sophie, Rossignol Marie, Ginibre Carole, Scheid Bethsabée, Lagneau Christophe, Chandre Fabrice, Baldet Thierry, Ogliastro Mylène, Bouyer Jérémy. 2020. Variation in the susceptibility of urban Aedes mosquitoes infected with a densovirus. Scientific Reports, 10:18654, 10 p.

Journal article ; Article de recherche ; Article de revue à facteur d'impact Revue en libre accès total
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Url - éditeur : https://rdcu.be/b9EYw

Abstract : Urban Aedes mosquitoes are vectors of many viruses affecting human health such as dengue, chikungunya and Zika viruses. Insecticide resistance and environmental toxicity risks hamper the effectiveness of chemical control against these mosquito vectors. Alternative control methods, such as the use of mosquito-specific entomopathogenic viruses should be explored. Numerous studies have focused on evaluating the potential of different densoviruses species as biological control agents. However, knowledge on the extent of inter- and intra-specific variations in the susceptibility of Aedes mosquitoes to infection by different densoviruses remains insufficient. In this study, we compared infection and mortality rates induced by the Aedes albopictus densovirus 2 in different strains of Aedes albopictus and Aedes aegypti mosquitoes. The two Aedes species were different in terms of susceptibility to viral infection. Under laboratory conditions, Aedes albopictus densovirus 2 appeared more virulent for the different strains of Aedes aegypti tested than for those of Aedes albopictus. In addition, we also found significant intra-specific variation in infection and mortality rates. Thus, although even if Aedes albopictus densoviruses could be powerful biocontrol agents used in the management of urban Aedes populations, our results also call into question the use of single viral isolate as biocontrol agents.

Mots-clés Agrovoc : Aedes, Aedes albopictus, Aedes aegypti, Densovirus, Virologie, Relation hôte pathogène, Agent de lutte biologique, Résistance aux maladies, Zone urbaine

Mots-clés libres : Invasive species, Virology, Virus–host interactions

Classification Agris : L73 - Animal diseases
L70 - Veterinary science and hygiene - General aspects

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

Agence(s) de financement européenne(s) : European Commission

Programme de financement européen : H2020

Projet(s) de financement européen(s) : Revolutionizing Insect Control

Auteurs et affiliations

  • Perrin Aurélie, CNRS (FRA) - auteur correspondant
  • Gosselin-Grenet Anne-Sophie, INRAE (FRA)
  • Rossignol Marie, IRD (FRA)
  • Ginibre Carole, CNRS (FRA)
  • Scheid Bethsabée, CNRS (FRA)
  • Lagneau Christophe, EID (FRA)
  • Chandre Fabrice, IRD (FRA)
  • Baldet Thierry, CIRAD-BIOS-UMR ASTRE (REU) ORCID: 0000-0003-2979-9517
  • Ogliastro Mylène, INRAE (FRA)
  • Bouyer Jérémy, CIRAD-BIOS-UMR ASTRE (AUT) ORCID: 0000-0002-1913-416X

Source : Cirad-Agritrop (https://agritrop.cirad.fr/596887/)

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