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Free Content Introduction of Aedes albopictus in Gabon: what consequences for dengue and chikungunya transmission?

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Abstract:

Summary The 2007 outbreak of chikungunya in Gabon has indicated the potential of this disease to spread beyond its usual range ensuing from the expansion of the mosquito . A few cases of dengue (DEN) infection were also detected. Because little is known about the potential for Gabonese mosquito species to transmit both chikungunya and DEN viruses (DENV), we conducted studies to determine the susceptibility of and collected in Libreville to both viruses by experimental infections. Disseminated infection rates were high for infected with chikungunya virus (CHIKV) (66.7–86%) and low with DENV (13–21.4%). Moreover, sp. was a less efficient vector of CHIKV than . The recent introduction and dissemination of chikungunya associated with the invasion of in Africa illustrates the potential for CHIKV to spread to other parts of the world.

French
L’épidémie de chikungunya en 2007 au Gabon a révélé le possibilité de cette maladie de se propager au-delà de son secteur habituel résultant de l’expansion du moustique Aedes albopictus. Un petit nombre de cas de dengue a également été détecté. Vu qu’il y a peu connaissance sur la capacité des d’espèces de moustiques gabonais de transmettre les virus du chikungunya et la dengue, nous avons mené des études visant à déterminer la sensibilité d’Ae. albopictus et Aedes aegypti recueillis à Libreville, aux deux virus par des infections expérimentales. Les taux d’infection disséminée étaient élevés pour Ae. albopictus infectées par le virus du chikungunya (66,7% - 86%) et faible par le virus de la dengue (13% - 21,4%). En outre, Ae. aegypti sp. formosus était un vecteur moins efficace du virus de chikungunya que Ae. albopictus. La récente introduction et la dissémination de chikungunya associéà l’invasion de l’Ae. albopictus en Afrique illustre la possibilité du virus du chikungunya de se propager vers d’autres parties du monde.

Keywords: Aedes albopictus; Gabon; Gabón; chikungunya; competencia vectorial; compétence vectorielle; dengue; vector competence

Document Type: Short Communication

DOI: http://dx.doi.org/10.1111/j.1365-3156.2008.02123.x

Affiliations: 1:  Génétique moléculaire des Bunyavirus, Institut Pasteur, Paris, France 2:  Laboratoire d’entomologie, Institut de Médecine Tropicale du Service de Santé des Armées, Marseille, France

Publication date: September 1, 2008

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