The mosquito <i>Aedes (Aedimorphus) vexans arabiensis</i> as a probable vector bridging the West Nile virus between birds and horses in Barkedji (Ferlo, Senegal)

Fall, Assane Guèye; Diaïté, Amadou; Etter, Éric; Bouyer, Jérémy; Ndiaye, Tolla; Konaté, Lassana

doi:10.1111/j.1365-2915.2011.00974.x

Cited by 18 publications

(23 citation statements)

References 20 publications

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“…Of the 319 meals identified, 156 (48.9%) were mixed meals and were mostly taken in August (53.85%). Similar observations have already been made by [19] and [23]. This high rate of mixed meals could be explained by the fact that August is the period corresponding to the peak abundance of Ae.…”

Section: Discussionsupporting

confidence: 88%

“…These self-defense reflexes developed by such few animals available and overexposed to the bites of a high population density of Ae. vexans arabiensis , fastly growing thanks to stocks of eggs from the previous rainy season, may even increase the rate of interrupted blood meals, favoring shifts between host species [23]. Thus, August seems to be the most favorable period for the spreading of the pathogens between hosts by Ae.…”

Section: Discussionmentioning

confidence: 99%

“…Although many studies on host preferences have been conducted for various mosquitoes, biting midges or tick vector species [17–22], so far in Senegal the molecular approach has been poorly used to determine the feeding behavior of disease vectors. Earlier investigations had used immunological assays [13, 19, 23] that have several inherent problems such as efficacy and reliability of blood meal identification [22, 24]. PCR based assays using different genetic markers have been developed for vectors targeting potential hosts for malaria, West Nile (WN) fever, African Horse Sickness or bluetongue research purposes (pig, human, goat, dog, cow; and avian) [17, 25–27].…”

Section: Introductionmentioning

confidence: 99%

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Feeding behavior of Aedes (Aedimorphus) vexans arabiensis, a Rift valley fever virus vector in the Ferlo pastoral ecosystem of Senegal

Bitèye

Fall

Seck

et al. 2019

Preprint

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25Host-vector contact is a key factor in vectorial capacity assessment and thus the 26 transmission of mosquito-borne viruses such as Rift Valley Fever (RVF), an emerging zoonotic 27 disease of interest in West Africa. The knowledge of the host-feeding patterns of vector species 28 constitutes a key element in the assessment of their epidemiological importance in a given 29 environment. The aim of this work was to identify the blood meal origins of Aedes vexans 30 arabiensis Patton (Diptera: Culicidae), the main vector of RVF virus in the Ferlo pastoral 31 ecosystem of Senegal. Engorged female mosquitoes were collected in Younouféré in the 32 pastoral ecosystem in the Ferlo region during the 2014 rainy season. CDC light CO2-baited 33 traps were set at six sites for two consecutive nights every month from July to November. 34 Domestic animals present around traps were identified and counted for each trapping session. 35 Blood meal sources of engorged mosquitoes were identified using a vertebrate-specific 36 multiplexed primer set based on cytochrome b. Blood meal sources were successfully identified 37 for 319 out of 416 blood-fed females (76.68%), of which 163 (51.1%) were single meals, 146 38 (45.77%) mixed meals from two different hosts and 10 (3.13%) mixed meals from three 39 different hosts. Aedes vexans arabiensis fed preferentially on mammals especially on horse 40 compared to other hosts (P < 0.001). Proportions of single and mixed meals showed significant 41 temporal (P < 0.001) and spatial variations (P < 0.001) according to hosts availability. Aedes 42 vexans arabiensis shows an opportunistic feeding behavior depending on the host availability. 43 Results were discussed in relation with the Rift valley fever virus transmission and vector 44 involvement as well as its primary hosts. 45 Keywords: Rift valley fever, blood meal origins, Aedes vexans arabiensis, vertebrate-specific 46 multiplexed primers, Senegal. 47 Introduction 3 48 Rift Valley Fever (RVF) is an emerging zoonotic vector-borne viral infection [1] considered 49 as a major problem of public and veterinary health as evidenced by various outbreaks in Africa 50 [2-6]. This disease causes significant economic gaps in terms of animal deaths and economic 51 losses in the affected countries [7-9]. Mosquitoes of the genera Aedes and Culex are the main 52 vectors of RVF virus (RVFV) and transmission mainly occur during inter-epizootic periods [1]. 53 RVF is endemic in Senegal, especially in the Ferlo region [10, 11]. The transmission of the 54 virus is seasonal and insured by Ae. vexans arabiensis and Cx. poicilipes with peaks of 55 transmission at the end of the rainy season [12-14]. Disease control is difficult because 56 mosquito vectors are able to fly on long distances and escape the border sanitary barriers. 57 Moreover, vector control methods are not used to control RVF outbreaks because they are 58 costly and difficult to implement and could have important environmental and ecological 59 consequences. However, host such as cattle could be trea...

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Feeding behavior of Aedes (Aedimorphus) vexans arabiensis, a Rift valley fever virus vector in the Ferlo pastoral ecosystem of Senegal

Bitèye

Fall

Seck

et al. 2019

Preprint

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“…vexans mosquitoes are widespread throughout Europe and are potential vectors of WNV and RVFV [24, 25]. A cell line, UM-AVE1, has been established from embryos of Ae.…”

Section: Reviewmentioning

confidence: 99%

Mosquito cell lines: history, isolation, availability and application to assess the threat of arboviral transmission in the United Kingdom

et al. 2014

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Mosquitoes are highly effective vectors for transmission of human and animal pathogens. Understanding the relationship between pathogen and vector is vital in developing strategies to predict and prevent transmission. Cell lines derived from appropriate mosquito hosts provide a relatively simple tool for investigating the interaction between the host and viruses transmitted by mosquitoes. This review provides a brief overview of the development of mosquito cell lines, methods of isolation, their availability and application for investigating insect-virus interactions.

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“…Findings in mosquitoes from Senegal suggest a connection between double‐feeding Aedes spp. (Diptera: Culicidae) and the incidence of West Nile virus (Fall et al , 2012).…”

Section: Logistic Regression Analysis Of Characteristics In Multiple mentioning

confidence: 99%

Multiple host feeding in Glossina palpalis gambiensis and Glossina tachinoides in southeast Mali

Hoppenheit

Bauer

Steuber

et al. 2012

Medical Vet Entomology

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Changes in agricultural practices and the resulting extinction of wildlife have led to the reduction or disappearance of savannah tsetse species. Riparian tsetse such as Glossina palpalis gambiensis Vanderplank 1949 and Glossina tachinoides Westwood 1850 (Diptera: Glossinidae) continue to persist in peridomestic sites, transmitting trypanosomiasis. At present, little is known about interspecies differences in feeding behaviour in these two species in southeast Mali, or of the phenomenon of multiple bloodmeals. To study these topics, 279 samples of G. p. gambiensis and G. tachinoides containing host DNA, caught in the Sikasso region between November 2008 and April 2009, were analysed by applying host species-specific primers and sequencing. Human accounted for > 66% of G. p. gambiensis bloodmeals, whereas G. tachinoides contained in equal parts DNA of human, cattle or both, showing a significantly higher proportion of multiple host use. Further, the trypanosome infection rate was found to be three-fold higher in G. tachinoides. Logistic regression analysis revealed double-feeding and infection to be independent of one another, but showed infection to be correlated with engorgement in G. p. gambiensis and female sex in G. tachinoides. Enhanced host-seeking activities paired with the high trypanosome infection rate found in G. tachinoides would indicate that this species has a higher vectorial capacity than G. p. gambiensis.

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The mosquito Aedes (Aedimorphus) vexans arabiensis as a probable vector bridging the West Nile virus between birds and horses in Barkedji (Ferlo, Senegal)

Cited by 18 publications

References 20 publications

Feeding behavior of Aedes (Aedimorphus) vexans arabiensis, a Rift valley fever virus vector in the Ferlo pastoral ecosystem of Senegal

Feeding behavior of Aedes (Aedimorphus) vexans arabiensis, a Rift valley fever virus vector in the Ferlo pastoral ecosystem of Senegal

Mosquito cell lines: history, isolation, availability and application to assess the threat of arboviral transmission in the United Kingdom

Multiple host feeding in Glossina palpalis gambiensis and Glossina tachinoides in southeast Mali

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