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111 results for “Aedes albopictus”
Fig. 2 in Effect of common ornamental plants on the survivorship and fecundity of the Aedes albopictus (Diptera: Culicidae)
Fig. 2. Survival curves of male (A, C, E) and female (B, D, F) Aedes albopictus exposed to different plant species, 10% sucrose, or water only. A and B refer to control groups; C and D refer to flowering plants; E and F refer to nonflowering plants.
Fig. 1 in Effect of common ornamental plants on the survivorship and fecundity of the Aedes albopictus (Diptera: Culicidae)
Fig. 1. Common ornamental plants from urban areas used in survival and fecundity assays of adult Aedes albopictus.
VEClim's initial assessment of Aedes albopictus activity and disease risk in three decades: historical (1980-1990), recent (2010-2020), and future (2090-2100).
<p><span>This is the initial release of VEClim, an early warning decision support system for climate-sensitive vector activity and vector-borne disease risk assessment, comprising an assessment of the seasonal dynamics of <em>Aedes albopictus</em>, the Asian tiger mosquito, and the associated risk of chikungunya virus transmission. This analysis compares three decades, i.e., historical (1980-1990), </span><span>recent <span>(2010-2020), and future (2090-2100), in terms of seasonal and geospatial averages. </span></span></p>
Aedes albopictus in Zambia
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The spread of Aedes albopictus (Diptera: Culicidae) in the islands of São Tome and Príncipe
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Fig. 1 in Mitochondrial Cytochrome Oxidase I Variation In Asian Tiger Mosquito (Aedes Albopictus): Determination Of The Different And Multiple Introduction Situations In Türkiye
Fig. 1. Collection points of A. albopictus samples used in the study
Combining transinfected Wolbachia and a genetic sexing strain to control Aedes albopictus in laboratory-controlled conditions
<p>The global expansion of <em>Aedes albopictus</em> has stimulated the development of environmental-friendly methods aiming at controlling disease transmission through the suppression of natural vector populations. Sterile male release programs are currently being deployed worldwide, and are challenged by the availability of an efficient sex separation that can be achieved mechanically at the pupal stage and/or by artificial intelligence at the adult stage, or through genetic sexing, which allows separating males and females at an early development stage. In this study, we combined the genetic sexing strain (GSS) previously established based on the linkage of dieldrin resistance to the male <em>locus</em> with a <em>Wolbachia</em> transinfected line. For this, we introduced either the <em>w</em>Pip-I or the <em>w</em>Pip-IV strain from <em>Culex pipiens </em>in an asymbiotic-Wolbachia-free <em>Ae</em>. <em>albopictus</em> line. We then measured the penetrance of CI and life history traits of both transinfected lines, selected the <em>w</em>Pip-IV line, and combined it with the GSS. Population suppression experiments demonstrated a 90% reduction in population size and a 50% decrease in hatching rate. Presented results showed that such a combination has a high potential in terms of vector control but also highlighted associated fitness costs, which should be reduced before large-scale field assay.</p>
No impact of biocontrol agent's predation cues on development time or size of surviving Aedes albopictus under optimal nutritional availability
<p>Cyclopoid copepods have been applied successfully to limit populations of highly invasive <em>Aedes albopictus</em> mosquitoes that can transmit diseases of public health importance. However, there is concern that changes in certain mosquito traits, induced by exposure to copepod predation, might increase the risk of disease transmission. In this study, third instar <em>Ae. albopictus</em> larvae, hereafter referred to as "focal individuals", were exposed to <em>Megacyclops viridis</em> predator cues associated with both consumption of newly-hatched mosquito larvae and attacks on focal individuals. The number of newly-hatched larvae surrounding each focal larva was held constant to control for density effects on size, and the focal individual's day of pupation and wing length were recorded for each replicate. Exposing late instar <em>Ae. albopictus</em> to predation decreased their chances of surviving to adulthood, and three focal larvae that died in the predator treatment showed signs of melanization, indicative of wounding. Among surviving focal <em>Ae. albopictus</em>, no significant difference in either pupation day or wing length was observed due to copepod predation. The absence of a significant sublethal impact from <em>M. viridis</em> copepod predation on surviving later-stage larvae in this analysis supports the use of <em>M. viridis</em> as a biocontrol agent against <em>Ae. albopictus</em>.</p>
ddRAD data for: Multiple introductions and overwintering shape the progressive invasion of Aedes albopictus beyond the Alps
<p class="MsoNormal"><em><span>Aedes albopictus</span></em><span> originates from Southeast Asia and is considered one of the most invasive species globally. This mosquito </span><span>is a nuisance and a disease vector of significant public health relevance</span><span>. </span><span>In Europe, <em>Ae. albopictus</em> is firmly established and widespread south of the Alps, a mountain range that forms a formidable biogeographic barrier to many organisms. Recent reports of <em>Ae. albopictus</em> north of the Alps raise questions of 1) the origins of its recent invasion, and 2) if this mosquito has established overwintering populations north of the Alps. To answer these questions, </span><span>we analyzed population genomic data from >4000 genome-wide SNPs obtained through </span><span>double digest restriction-site associated DNA sequencing</span><span>. </span><span>We collected SNPs data from specimens from 6 sites in Switzerland, north and south of the Alps, and analyzed them together with specimens from other 33 European sites, 5 from the Americas, and 5 from its Asian native range. At a global level, we detected 4 genetic clusters with specimens from </span><span>Indonesia, Brazil and Japan as the most differentiated, whereas specimens from Europe, Hong Kong and USA largely overlapped</span><span>. Across the Alps, </span><span>we detected a weak genetic structure and high levels of genetic admixture, supporting a scenario of rapid and human-aided dispersal along transportation routes. While the genetic pattern suggests frequent re-introductions from Italian sources into Switzerland, t</span><span>he recovery of a pair of full siblings in two consecutive years in Strasbourg, France, suggests the presence of an overwintering population north of the Alps. </span><span>The finding of overwintering populations of <em>Ae. albopictus </em>north of the Alps and the expansion patterns points to an increased risk of further northwards expansion and the need for increased surveillance of mosquito populations in northern Europe.</span></p> <p> </p>
Fitness costs associated with a GABA receptor mutation conferring dieldrin resistance in Aedes albopictus
<p><span>Understanding the dynamics of insecticide resistance genes in mosquito populations is pivotal for a sustainable use of insecticides. Dieldrin resistance in <em>Aedes</em> <em>albopictus</em> is conferred by the alanine to serine substitution (A302S or <em>Rdl<sup>R</sup></em> allele) in the γ-aminobutyric acid (GABA) receptor encoded by the <em>Rdl</em> gene. On Reunion Island, dieldrin resistance was initially reported in natural <em>Ae</em>. <em>albopictus</em> populations sampled in 2008 despite the ban of dieldrin since 1994. To monitor insecticide resistance in <em>Ae</em>. <em>albopictus</em> on the island and to identify its drivers, we measured (i) the frequency of resistance alleles in 19 distinct natural populations collected between 2016 and 2017, (ii) fitness costs associated with dieldrin resistance in laboratory-controlled experiments, and (iii) the resistance conferred by </span><span><em>Rdl<sup>R</sup></em></span><span> to fipronil, an insecticide widely used on the island and reported to cross-react with </span><span><em>Rdl<sup>R</sup></em></span><span>. The results show a persistence of </span><span><em>Rdl<sup>R</sup></em></span><span> in <em>Ae</em>. <em>albopictus</em> natural populations at low frequencies. Among the measured life history traits, mortality in pre-imaginal stages, adults' survival as well as the proportion of egg-laying females were significantly affected in resistant mosquitoes. Finally, bioassays revealed resistance of </span><span><em>Rdl<sup>R</sup></em></span><span> mosquitoes to fipronil, suggesting that the use of fipronil <em>in</em> <em>natura</em> could select for the </span><span><em>Rdl<sup>R</sup></em></span><span> allele. This study shows that dieldrin resistance is persistent in natural mosquito populations likely as a result of combined effects between fitness costs associated with </span><span><em>Rdl<sup>R</sup></em></span><span> and selection exerted by cross-reacting environmental insecticides such as fipronil.</span></p>
Genome-wide association analysis identifies naturally segregating genetic variation associated with the rapid evolution of diapause in Aedes albopictus, an invasive vector mosquito.
<p>The raw data for genotype calls, the output files from the genotype calls, the code to replicate the analysis, and the output of the analysis.</p>
Data from: The global compendium of Aedes aegypti and Ae. albopictus occurrence
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Data from: The role of temperature in affecting carry-over effects and larval competition in the globally invasive mosquito, Aedes albopictus
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Fitness costs associated with a GABA receptor mutation conferring dieldrin resistance in Aedes albopictus
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ddRAD data for: Multiple introductions and overwintering shape the progressive invasion of Aedes albopictus beyond the Alps
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Data from: Fine-scale variation in microclimate across an urban landscape shapes variation in mosquito population dynamics and the potential of Aedes albopictus to transmit arboviral disease
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Combining transinfected Wolbachia and a genetic sexing strain to control Aedes albopictus in laboratory-controlled conditions
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No impact of biocontrol agent’s predation cues on development time or size of surviving Aedes albopictus under optimal nutritional availability
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Data from: Rapid adaptation to novel climate at the northern range edge of the invasive Asian tiger mosquito Aedes albopictus: a moving target
1. Rapid adaptation in response to novel environments can facilitate species invasions and range expansions. Understanding how invasive disease vectors rapidly evolve to novel conditions—particularly at the edge of its non-native range—has important implications for mitigating the prevalence and spread of disease. 2. Here, we evaluate the role of local adaptation in overwintering capability of the Asian tiger mosquito, Aedes albopictus. This species invaded the Southern US in the 1980s and rapidly spread northward into novel climate compared to its native range. Photoperiodically induced egg diapause is a key trait contributing to the establishment and spread of Ae. albopictus in temperate latitudes, and diapause incidence rapidly developed a cline along a latitudinal gradient in the US shortly after its initial invasion. However, variation in overwintering survival of diapause-induced eggs along this gradient is not known, but is critical to the fitness-related role of diapause evolution in the establishment and spread of Ae. albopictus in its northern US range. 3. Using reciprocal transplants, we detected local adaptation in overwinter survival of diapausing Aedes albopictus eggs. In northern range-edge winters, eggs produced by range-edge individuals survived better than those produced by range-core individuals. Diapause eggs from range-edge and range-core locations survived equally well in range-core winters, and no eggs survived a winter beyond the current northern range limit in the US. 4. Synthesis and applications. These results demonstrate rapid (~ 3 decades) local adaptation of egg diapause, a key trait facilitating overwinter survival and range expansion for the invasive Asian tiger mosquito. In light of these results, control efforts could shift from targeting satellite populations to a focus on preventing dispersal into locally adapted, range-edge locations and to aim removal efforts towards areas surrounding locally adapted populations. Adopting new approaches to target rapidly adapting populations will require large-scale collaboration among control agencies and research institutions, and should begin in the northern US range to better control Ae. albopictus mosquito populations in the face of rapid adaptation.
Data from: Bionomics and insecticide resistance of the arboviral vector Aedes albopictus in northern Lao PDR
In the last four decades there has been a staggering increase in the geographical range of the arboviral vector Aedes albopictus (Skuse, 1894). This species is now found in every continent except Antarctica, increasing the distribution of arboviral diseases such as dengue and chikungunya. In Lao PDR dengue epidemics occur regularly, with cases of chikungunya also reported. As treatment methods for arboviral diseases is limited, the control of the vector mosquitoes are essential. There is a paucity of information on the bionomics and resistance status of this mosquito for successful vector control efforts. Here we describe the bionomics and insecticide resistance status of Ae. albopictus in Laos to identify opportunities for control. Adult Ae. albopictus were collected using human-baited double bed net (HDN) traps in forests, villages and rubber plantations and tested for alpha- and flaviviruses with RT-PCR. Surveys were also conducted to identify larval habitats. Seven adult and larval populations originating from Vientiane Capital and Luang Prabang province were tested against DDT, malathion, permethrin, deltamethrin and, temephos following WHO protocols. Aedes albopictus were found throughout the year, but were six-fold greater in the rainy season than the dry season. Adult females were active for 24 hours, with peak of behaviour at 18.00 h. The secondary forest and rubber plantation samples showed evidence of Pan-flaviviruses, while samples from the villages did not. More than half of the emerged Ae. albopictus were collected from mature rubber plantations (53.9%; 1,533/2,845). Most Ae. albopictus mosquitoes emerged from latex collection cups (19.7%; 562/2,845), small water containers (19.7%; 562/2,845) and tyres (17.4%; 495/2,845). Adult mosquitoes were susceptible to pyrethroids, apart from one population in Vientiane city. All populations were resistant to DDT (between 27–90% mortality) and all except one were resistant to malathion (20–86%). Three of the seven larval populations were resistant to temephos (42–87%), with suspected resistance found in three other populations (92–98%).This study demonstrates that rural areas in northern Laos are potential hot spots for arboviral disease transmission. Multiple-insecticide resistance was found. Aedes albopictus control efforts in villages need to expand to include secondary forests and rubber plantations, with larval source management and limited use of insecticides.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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OpenNeuro
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