ArticleMalaria journal2014
First report of an exophilic Anopheles arabiensis population in Bissau City, Guinea-Bissau: recent introduction or sampling bias?
Article in Malaria journal, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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16 citing papers in PubMed.
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- A survey of indoor and outdoor Anopheles density, species composition and circumsporozoite rate of malaria vectors on the Bijagós Archipelago, Guinea-Bissau.Malaria journal · 2025Article
- Methods of sampling malaria vectors and their reliability in estimating entomological indices in Africa.Journal of medical entomology · 2024Review
- Sibling species of the major malaria vector Anopheles gambiae display divergent preferences for aquatic breeding sites in southern Nigeria.Malaria journal · 2024Article
- Six decades of malaria vector control in southern Africa: a review of the entomological evidence-base.Malaria journal · 2022Review
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- Urban malaria in sub-Saharan Africa: dynamic of the vectorial system and the entomological inoculation rate.Malaria journal · 2021Review
- Secondary malaria vectors in western Kenya include novel species with unexpectedly high densities and parasite infection rates.Parasites & vectors · 2021Article
- Impact of seasonality and malaria control interventions on Anopheles density and species composition from three areas of Uganda with differing malaria endemicity.Malaria journal · 2021Article
- Complete mitogenome sequence ofMitochondrial DNA. Part B, Resources · 2020Article
- Emergence of behavioural avoidance strategies of malaria vectors in areas of high LLIN coverage in Tanzania.Scientific reports · 2020Article
- A survey of Anopheles species composition and insecticide resistance on the island of Bubaque, Bijagos Archipelago, Guinea-Bissau.Malaria journal · 2020Article
- TheeLife · 2017Article
- Massive introgression drives species radiation at the range limit of Anopheles gambiae.Scientific reports · 2017Article
- Exploring the potential of using cattle for malaria vector surveillance and control: a pilot study in western Kenya.Parasites & vectors · 2017Article
- Article
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12 authors.
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Abstract
backgroundThe malaria vector Anopheles arabiensis exhibits greater behavioural and ecological plasticity than the other major vectors of the Anopheles gambiae complex, which presents challenges for major control methods. This study reports for the first time the presence of An. arabiensis in Antula, a suburb of Bissau city, the capital of Guinea Bissau, where high levels of hybridization between Anopheles coluzzii and An. gambiae have been reported. Given that previous surveys in the area, based on indoor collections, did not sample An. arabiensis, the possibility of a recently introduced exophilic population was investigated.
methodsLarval and adult mosquito collections were carried out in Antula at the end of the rainy season of 2010. Anopheles gambiae species composition, determined by rDNA-IGS and SINE200X6.1 markers, was compared with four previously collected samples dating back to 1993. Analysis of ten microsatellites was used to estimate levels of genetic diversity, relatedness and to investigate demographic stability.
resultsAnopheles arabiensis comprised 54.0% of larvae and 25.6% of adults collected in 2010, but was absent in all previous collections, a highly unlikely observation by chance if the population was stable. This species had the lowest levels of genetic diversity, highest relatedness and, along with An. gambiae, exhibited evidence of a recent population expansion.
conclusionsResults point to the presence of a previously undetected outdoor population of An. arabiensis in Antula, which appears to have expanded recently, highlighting the importance of complementing indoor-based mosquito collections with sampling methods targeting outdoor adults and immature stages for a more complete assessment of mosquito biodiversity. A change in temporal dynamics in the species complex composition was also detected. Coupled with previous evidence of asymmetric introgression from An. coluzzii to An. gambiae, this suggests that the study area may be subject to ecological changes with a potential impact on both the genetics of these species and on malaria transmission.
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