Paupy Christophe, Brengues Cécile, Ndiath Ousmane, Toty Céline, Hervé Jean-Pierre, Simard Frédéric. (2010). Morphological and genetic variability within Aedes aegypti in Niakhar, Senegal. Infection, Genetics and Evolution, 10 (4), p. 473-480. ISSN 1567-1348.
Titre du document
Morphological and genetic variability within Aedes aegypti in Niakhar, Senegal
Année de publication
2010
Auteurs
Paupy Christophe, Brengues Cécile, Ndiath Ousmane, Toty Céline, Hervé Jean-Pierre, Simard Frédéric
Source
Infection, Genetics and Evolution, 2010,
10 (4), p. 473-480 ISSN 1567-1348
Aedes aegypti (Linné, 1762) is a major vector of arboviruses such as Yellow Fever, Dengue and Chikungunya. In Africa, where the species exhibits major variations in morphology, ecology, behavior and vector competence, two subspecies have been described: a light form, named Ae. aegypti aegypti (Aaa) with highly domestic and anthropophilic habits and a cosmotropical distribution; and a dark form, referred to as Ae. aegypti formosus (Aaf), which is endemic to Africa and thrives in sylvan environments. In East Africa, both forms were described to occur in sympatry whereas only Aaf was reported from Central/West Africa. However, recent findings suggest Aaa was also common in Senegal. Here, we report on a longitudinal survey of morphological and genetic variability of Ae. aegypti sampled in the rural environment of Niakhar, Senegal. In agreement with recent findings, most of specimens we analyzed were classified as Aaa suggesting typical Aaf was scarce in the studied area. Among Aaa, significant temporal variations in abdominal pale scales pattern were detected. Depending on the season and the nature of larval breeding places, the specimens (particularly females) tend to segregate in two main morphological groups. Microsatellite-based estimates of genetic differentiation did not provide any clear evidence that the two groups were genetically distinct. Overall, these results improve our understanding of the diversity of Ae. aegypti in West Africa, where data are crucially lacking.
Plan de classement
Répartition et bioécologie des culicidés [052CULARB02]
Descripteurs
ARBOVIROSE ; FIEVRE JAUNE ; DENGUE ; VECTEUR ; MOUSTIQUE ; VARIABILITE GENETIQUE ; POLYMORPHISME GENETIQUE ; POLYMORPHISME INTRASPECIFIQUE ; STRUCTURE GENETIQUE ; GENOTYPE ; CARACTERE MORPHOLOGIQUE ; VARIATION SAISONNIERE ; MARQUEUR MICROSATELLITE
Description Géographique
SENEGAL
Localisation
Fonds IRD [F B010050146]
Identifiant IRD
fdi:010050146
