Publications des agents du Cirad


Exploring the diversity of blood-sucking Diptera in caves of Central Africa

Obame Nkoghe J., Rahola N., Ayala D., Yangari P., Jiolle D., Allene X., Bourgarel M., Maganga G.D., Berthet N., Leroy E.M., Paupy C.. 2017. Scientific Reports, 7 : 11 p..

Caves house pathogenic microorganisms, some of which are transmitted by blood-sucking arthropods. In Africa, previous studies identified mosquitoes, sand flies and biting midges as the main potential vectors of cave-dwelling pathogens. However, to understand their involvement in pathogen spillover, it is crucial to characterize their diversity, community composition and dynamics. Using CDC light traps, we collected hematophagous Diptera in six caves of Gabon during one-shot or longitudinal sampling, and investigated their species diversity and dynamics in relation with external rainfall. Overall, we identified 68 species of mosquitoes, sand flies and biting midges, including 45 new records for Gabon. The dominant species were: Uranotaenia nigromaculata, Anopheles smithii s.l., Culex. rima group and Culex quasiguiarti for mosquitoes, Spelaeophlebotomus gigas and Spelaeomyia emilii for sand flies and the Culicoides trifasciellus group and Culicoides fulvithorax for biting midges. The survey revealed that species assemblages were cave-specific and included mainly troglophilous and trogloxenous species. Both diversity and abundance varied according to the cave and sampling time, and were significantly associated with rainfall. These associations were modulated by the cave specific environmental conditions. Moreover, the presence of trogloxenous and troglophilous species could be of high significance for pathogen transfers between cave and epigeous hosts, including humans. (Résumé d'auteur)

Mots-clés : culicidae; ceratopogonidae; phlebotominae; biotope; caverne; espèce; identification; enquête; culicoides; culex; anopheles; uranotaenia; piégeage des animaux; piège lumineux; hématophagie; vecteur de maladie; dynamique des populations; biodiversité; diptera; gabon; afrique centrale; spelaeophlebotomus gigas; spelaeomyia emilii; culicoides fulvithorax; culicoides trifasciellus; culex quasiguiarti; culex rima; anopheles smithii; uranotaenia nigromaculata

Thématique : Organismes nuisibles des animaux; Maladies des animaux; Taxonomie et géographie animales

Documents associés

Article de revue

Agents Cirad, auteurs de cette publication :