Update on the geographical distribution and prevalence of Aedes aegypti and Aedes albopictus (Diptera: Culicidae), two major arbovirus vectors in Cameroon

摘要: Introduction Arboviral diseases including dengue are increasingly spreading in the tropical/subtropical world Africa. Updated knowledge on distribution and abundance of major vectors Aedes aegypti albopictus constitutes crucial surveillance action to prepare African countries such as Cameroon for potential arbovirus outbreaks. Here, we present a nationwide survey assess current geographical prevalence both genetic diversity profiling Ae. (invasive species) using mitochondrial DNA. Methods Immature stages were collected between March August 2017 29 localities across following north-south east-west transects. Larvae pupae from several containers each location, reared adult morphologically identified. Genetic 16 locations analysed Cytochrome Oxidase I gene (COI). Results In total, 30,381 immature with an average 646.40±414.21 per location identified country comprising 69.3% 30.7% aegypti. Analysis revealed that is still distributed nation widely whereas limited southern part, around 6°4’N. However, most prevalent species all where sympatric except Douala predominant. This suggests factors climate, vegetation, building density impact Cameroon. Mitochondrial DNA analysis low populations common haplotype resulting ranging 0.13 0.65 0.35 total sample. Similarly, nucleotide was also reported varying 0.0000 0.0017 overall index 0.0008. polymorphism consistent recent introduction Cameroon. Conclusion This updated will help planning vector control programme against possible outbreak related country.