Changes in Anopheles funestus Biting Behavior Following Universal Coverage of Long-Lasting Insecticidal Nets in Benin

Moiroux, Nicolas; Gomez, Marinely Bustamante; Pennetier, Cédric; Elanga, Emmanuel; Djènontin, Armel; Chandre, Fabrice; Djègbè, Innocent; Guis, Hélène; Corbel, Vincent

doi:10.1093/infdis/jis565

Cited by 328 publications

(306 citation statements)

References 33 publications

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“…funestus population. 3,[64][65][66][67][68][69][70][71] The longevity of An. funestus is particularly important because a higher proportion of malarial parasites can successfully develop and, combined with frequent exposure to infections still present in the local human population, can continue transmission into the wet season.…”

Section: Discussionmentioning

confidence: 99%

Habitat Partitioning of Malaria Vectors in Nchelenge District, Zambia

Das

Muleba

Stevenson

et al. 2016

The American Society of Tropical Medicine and Hygiene

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Abstract. Nchelenge District in Luapula Province, northern Zambia, experiences holoendemic malaria despite implementation of vector control programs. The major Anopheles vectors that contribute to Plasmodium falciparum transmission in this area had not previously been well defined. Three collections performed during the 2012 wet and dry seasons and the 2013 wet season revealed Anopheles funestus sensu stricto and Anopheles gambiae sensu stricto as the main vectors, where 80-85% of each collection was composed of An. funestus. Both vectors were found to be highly anthropophilic, and An. funestus has higher sporozoite infection rates (SIRs) and entomological inoculation rates (EIRs) year-round compared with An. gambiae: SIRs of 1.8-3.0% and 0-2.5%, respectively, and EIRs of 3.7-41.5 infectious bites per 6-month period (ib/p/6mo) and 0-5.9 ib/p/6mo, respectively. Spatial and temporal changes in each vector's dynamics and bionomics were also observed. Anopheles funestus was the predominant vector in the villages near Kenani Stream in both wet and dry seasons, whereas An. gambiae was found to be the main vector in areas near Lake Mweru during the wet season. The vector data illustrate the need for broader temporal and spatial sampling in Nchelenge and present unique opportunities to further our understanding of malarial transmission and implications for malarial control in high-risk areas.

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Section: Discussionmentioning

confidence: 99%

Habitat Partitioning of Malaria Vectors in Nchelenge District, Zambia

Das

Muleba

Stevenson

et al. 2016

The American Society of Tropical Medicine and Hygiene

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“…Several RVFV vectors are exophilic species and probably escape these treatments. The negative effect is the appearance of more exophilic and zoophilic populations after indoor treatment, which was observed in Equatorial Guinea, 74 Tanzania, 75 Benin, 76 and Senegal. 77 For RVF infection, this negative effect is poorly documented and therefore, speculative.…”

Section: Risk Factors Associated With Mosquito Populationsmentioning

confidence: 99%

A Review of Mosquitoes Associated with Rift Valley Fever Virus in Madagascar

Tantely¹,

Boyer²,

Fontenille³

2015

The American Society of Tropical Medicine and Hygiene

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Abstract. Rift Valley fever (RVF) is a viral zoonotic disease occurring throughout Africa, the Arabian Peninsula, and Madagascar. The disease is caused by a Phlebovirus (RVF virus [RVFV]) transmitted to vertebrate hosts through the bite of infected mosquitoes. In Madagascar, the first RVFV circulation was reported in 1979 based on detection in mosquitoes but without epidemic episode. Subsequently, two outbreaks occurred: the first along the east coast and in the central highlands in 1990 and 1991 and the most recent along the northern and eastern coasts and in the central highlands in 2008 and 2009. Despite the presence of 24 mosquitoes species potentially associated with RVFV transmission in Madagascar, little associated entomological information is available. In this review, we list the RVFV vector, Culex antennatus, as well as other taxa as candidate vector species. We discuss risk factors from an entomological perspective for the re-emergence of RVF in Madagascar.

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“…Anopheles mosquitoes currently experience strong selective pressures across the African continent due to the increased use of pesticides/insecticides in agriculture and vector control over thelastfewdecades(WHO2012;ReidandMcKenzie2016).The idea that insecticide resistance can affect the population structure of mosquitoes as a result of a limited gene flow and/or local adaptation between resistant and sensitive populations was already evoked in the 1990s (Silvestrini et al 1998;Lenormand et al 1999). In addition to increased resistance, large-scale exposure of vector populations to insecticidetreated bed nets in Africa is also correlated with changes in species distribution and behavioral shifts (Bøgh et al 1998;Derua et al 2012;Moiroux et al 2012;Mwangangi et al 2013;Sokhna et al 2013). However, so far, despite ongoing efforts, there is no evidence that these changes can lead to genetic clustering or the creation of cryptic populations within species (e.g., Main et al 2016).…”

Section: Genomic Signatures Of Selectionmentioning

confidence: 99%

Pollutants and insecticides drive local adaptation in African malaria mosquitoes

Kamdem

Fouet

Gamez

et al. 2016

Preprint

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The Anopheles gambiae complex contains a number of highly anthropophilic mosquito species that have acquired exceptional ability to thrive in complex human habitats. Thus, examining the evolutionary history of this Afrotropical mosquito may yield vital information on the selective processes that occurred during the adaptation to humandominated environments. We performed reduced representation sequencing on 941 mosquitoes of the Anopheles gambiae complex collected across four ecogeographic zones in Cameroon. We find evidence for genetic and geographic subdivision within An. coluzzii and An. gambiae sensu stricto-the two most significant malaria vectors in the region. Importantly, in both species, rural and urban populations are genetically differentiated. Genome scans reveal pervasive signatures of selection centered on genes involved in xenobiotic resistance. Notably, a selective sweep containing detoxification enzymes is prominent in urban mosquitoes that exploit polluted breeding sites. Overall, our study suggests that recent anthropogenic environmental modifications and widespread use of insecticides are driving population differentiation and local adaptation in vectors with potentially significant consequences for malaria epidemiology.

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Changes in Anopheles funestus Biting Behavior Following Universal Coverage of Long-Lasting Insecticidal Nets in Benin

Cited by 328 publications

References 33 publications

Habitat Partitioning of Malaria Vectors in Nchelenge District, Zambia

Habitat Partitioning of Malaria Vectors in Nchelenge District, Zambia

A Review of Mosquitoes Associated with Rift Valley Fever Virus in Madagascar

Pollutants and insecticides drive local adaptation in African malaria mosquitoes

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