Mosquito Attractants

Journal of Chemical Ecology, Год журнала: 2021, Номер 47(4-5), С. 351 - 393

Опубликована: Март 16, 2021

Язык: Английский

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The behaviour of adult Anopheles gambiae, sub-Saharan Africa’s principal malaria vector, and its relevance to malaria control: a review

Malaria Journal, Год журнала: 2024, Номер 23(1)

Опубликована: Май 23, 2024

Abstract Background Mosquitoes of the Anopheles gambiae complex are one major vectors malaria in sub-Saharan Africa. Their ability to transmit this disease public health importance is dependent on their abundance, biting behaviour, susceptibility and survive long enough parasites. A deeper understanding behaviour can be exploited for improving vector surveillance control. Findings Adult mosquitoes emerge from aquatic habitats at dusk. After a 24 h teneral period, which cuticle hardens adult matures, they may disperse random search upwind mate or feed. Mating generally takes place dusk swarms that form over species-specific ‘markers’. Well-nourished females before blood-feeding, but reverse true poorly-nourished insects. Females monogamous only once whilst males, feed nectar, swarm nightly potentially up four times. able locate hosts by following carbon dioxide odour gradients. When close proximity host, visual cues, temperature relative humidity also used. Most blood-feeding occurs night, indoors, with entering houses mainly through gaps between roof walls. With exception first feed, gonotrophically concordant blood meal gives rise complete egg batch. Egg development two three days depending temperature. Gravid leave resting sites They attracted water gradients volatile chemicals provide suitable habitat lay eggs. Conclusion Whilst traditional interventions, using insecticides, target additional protection achieved spatial repellents outdoors, attractant traps house modifications prevent mosquito entry. Future research variability movement across landscape, light vision, reproductive barriers gene flow, male evolutionary changes could lead an improvement better methods control reducing current over-reliance indoor application insecticides.

Язык: Английский

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EggCountAI: a convolutional neural network-based software for counting of Aedes aegypti mosquito eggs

Parasites & Vectors, Год журнала: 2023, Номер 16(1)

Опубликована: Окт. 2, 2023

Mosquito-borne diseases exert a huge impact on both animal and human populations, posing substantial health risks. The behavioural fitness traits of mosquitoes, such as locomotion fecundity, are crucial factors that influence the spread diseases. In existing egg-counting tools, each image requires separate processing with adjustments to various parameters intensity threshold egg area size. Furthermore, accuracy decreases significantly when dealing clustered or overlapping eggs. To overcome these issues, we have developed EggCountAI, Mask Region-based Convolutional Neural Network (RCNN)-based free automatic tool for Aedes aegypti mosquitoes.The study design involves developing EggCountAI counting mosquito eggs comparing its performance two commonly employed tools-ICount MECVision-using 10 microscopic macroscopic images laid by females paper strip. results were validated through manual strips using ImageJ software. Two different models trained enhance detection accuracy, achieving mean average precision, recall, F1-scores 0.92, 0.90, 0.91 model, 0.91, 0.90 respectively. automatically counts in folder containing strip images, offering adaptable filtration handling impurities varying sizes.The obtained from highlight remarkable performance, overall 98.88% micro 96.06% macro images. outperformed ICount MECVision, 81.71% 82.22% while MECVision achieved 68.01% 51.71% also excelled other statistical parameters, absolute error 1.90 micro, 74.30 macro, strong correlation R-squared value (0.99) macro. superior was most evident eggs.Accurate enables identification preferred egg-laying sites facilitates optimal placement oviposition traps, enhancing targeted vector control efforts disease transmission prevention. future research, holds potential extend application monitor feeding preferences.

Язык: Английский

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Egg-laying by female Aedes aegypti shapes the bacterial communities of breeding sites

BMC Biology, Год журнала: 2023, Номер 21(1)

Опубликована: Апрель 26, 2023

Abstract Background Aedes aegypti , the main arboviral mosquito vector, is attracted to human dwellings and makes use of human-generated breeding sites. Past research has shown that bacterial communities associated with such sites undergo compositional shifts as larvae develop exposure different bacteria during larval stages can have an impact on development life-history traits. Based these facts, we hypothesized female Ae. shape oviposition a form niche construction favor offspring fitness. Results To test this hypothesis, first verified gravid females act mechanical vectors bacteria. We then elaborated experimental scheme site microbiota. Five groups were set up sterile aqueous solution food, subsequently exposed (1) environment alone, (2) surface-sterilized eggs, (3) unsterilized (4) non-egg laying female, or (5) by female. The microbiota differently treated was assessed amplicon-oriented DNA sequencing once from eggs had completed formed pupae. Microbial ecology analyses revealed significant differences between five treatments in terms diversity. In particular, between-treatment abundance profiles detected, showing induce decrease microbial alpha diversity through oviposition. addition, indicator species analysis pinpointed taxa predicting values fidelity coefficients for samples which single laid eggs. Furthermore, provide evidence regarding how one taxa, Elizabethkingia exerts positive effect fitness larvae. Conclusions Ovipositing composition community site, promoting certain over those prevailing environment. Among bacteria, found known symbionts showed they improve if present water where are laid. deem oviposition-mediated shaping initiated

Язык: Английский

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Chemical Ecology and Management of Dengue Vectors

Annual Review of Entomology, Год журнала: 2023, Номер 69(1), С. 159 - 182

Опубликована: Авг. 25, 2023

Dengue, caused by the dengue virus, is most widespread arboviral infectious disease of public health significance globally. This review explores communicative function olfactory cues that mediate host-seeking, egg-laying, plant-feeding, and mating behaviors in

Язык: Английский

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Female Aedes aegypti mosquitoes use communal cues to manage population density at breeding sites

Communications Biology, Год журнала: 2024, Номер 7(1)

Опубликована: Янв. 31, 2024

Where a female mosquito lays her eggs creates the conditions for reproductive success. Here we identify communal behavior among ovipositing mosquitoes. When choosing equal breeding sites, gravid Aedes aegypti aggregate more often than expected. This aggregation occurs when water contact is restricted and does not require presence of eggs. Instead, regulated by number females present at site. Using assays with both occupied empty oviposition show that Orco olfactory co-receptor carbon dioxide receptor, Gr3, detect orco mutants in suggesting attractive cues influence to associate one another. Gr3 mutant do prefer either site, CO

Язык: Английский

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Mosquito-disseminated pyriproxyfen for mosquito-borne disease control in Belo Horizonte, Brazil: a pragmatic, before–after control–intervention paired-series trial

The Lancet Infectious Diseases, Год журнала: 2024, Номер unknown

Опубликована: Сен. 1, 2024

Язык: Английский

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Odor-mediated response of gravid Aedes aegypti to mosquito-associated symbiotic bacteria

Acta Tropica, Год журнала: 2022, Номер 237, С. 106730 - 106730

Опубликована: Окт. 21, 2022

Язык: Английский

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Ovipositional responses of tortricid moths to sugars, salts and neem oil

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Янв. 19, 2024

Abstract Oviposition is essential in the life history of insects and mainly mediated by chemical tactile cues present on plant surface. deterrents or stimulants can modify insect oviposition be employed pest control. Relatively few gustatory stimuli have been described for tortricid moths. In this study effect NaCl, KCl, sucrose, fructose neem oil number eggs laid Cydia pomonella (L.), Grapholita molesta (Busck) Lobesia botrana (Dennis & Schifermüller) was tested laboratory arenas containing filter papers loaded with 3 doses a given stimulus solvent general, salts increased at mid dose (10 2 M) sugars reduced it highest mM), but these effects depended species. Neem dramatically as increased, lowest (0.1% v/v) L. relative to Our shows that ubiquitous chemicals moth under conditions, strong deterrent. The arena developed convenient tool test tastants behavior

Язык: Английский

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A potential link between aromatics‐induced oviposition repellency behaviors and specific odorant receptor of Aedes albopictus

Pest Management Science, Год журнала: 2024, Номер 80(7), С. 3603 - 3611

Опубликована: Март 8, 2024

Abstract BACKGROUND The Asian tiger mosquito, Aedes albopictus , is a competent vector for the spread of several viral arboviruses including dengue, chikungunya, and Zika. Several vital mosquito behaviors linked to survival reproduction are primarily dependent on sophisticated olfactory system semiochemical perception. However, limited number studies has hampered our understanding relationship between A. acute complex chemical world. RESULTS Here, we performed qRT‐PCR assay antennae from differing sex, age physiological states, found that AalbOr10 was enriched in blood‐fed female mosquitoes. We then undertook single sensillum recording de‐orphan using panel physiologically behaviorally relevant odorants Drosophila ‘empty neuron’ system. results indicated activated by seven aromatic compounds, all which egg‐laying Furthermore, post‐RNA interference oviposition assay, reducing transcript level affected repellent activity mediated 2‐ethylphenol at low concentrations (10 −4 vol/vol). Computational modeling molecular docking suggested hydrogen bonds Y68 Y150 interaction with AalbOr10. CONCLUSION reveal potential link aromatics‐induced repellency specific odorant receptor . Our findings provide foundation identifying active semiochemicals monitoring or controlling populations. © 2024 Society Chemical Industry.

Язык: Английский

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