Ecology of Aedes Mosquitoes, the Major Vectors of Arboviruses in Human Population

Kweka, Eliningaya J.; Baraka, Vito; Mathias, Leah; Mwang'onde, Beda J; Baraka, Germana T; Lyaruu, Lucile J.; Mahande, Aneth M

doi:10.5772/intechopen.81439

Cited by 26 publications

(32 citation statements)

References 51 publications

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“…As an important and rapidly adapting insect, Ae. albopictus has biological characteristics that are strongly influenced by environmental conditions [ 9 , 10 ]. In tropical and subtropical regions, the climate is hot and wet, making it more suitable for the survival of Ae.…”

Section: Discussionmentioning

confidence: 99%

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Dispersal patterns and population genetic structure of Aedes albopictus (Diptera: Culicidae) in three different climatic regions of China

et al. 2021

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Background Aedes albopictus is an indigenous primary vector for dengue and Zika viruses in China. Compared with its insecticide resistance, biology and vector competence, little is known about its genetic variation, which corresponds to environmental variations. Thus, the present study examines how Ae. albopictus varies among different climatic regions in China and deciphers its potential dispersal patterns. Methods The genetic variation and population structure of 17 Ae. albopictus populations collected from three climatic regions of China were investigated with 11 microsatellite loci and the mitochondrial coxI gene. Results Of 44 isolated microsatellite markers, 11 pairs were chosen for genotyping analysis and had an average PIC value of 0.713, representing high polymorphism. The number of alleles was high in each population, with the ne value increasing from the temperate region (3.876) to the tropical region (4.144). Twenty-five coxI haplotypes were detected, and the highest diversity was observed in the tropical region. The mean Ho value (ca. 0.557) of all the regions was significantly lower than the mean He value (ca. 0.684), with nearly all populations significantly departing from HWE and displaying significant population expansion (p value < 0.05). Two genetically isolated groups and three haplotype clades were evaluated via STRUCTURE and haplotype phylogenetic analyses, and the tropical populations were significantly isolated from those in the other regions. Most genetic variation in Ae. albopictus was detected within populations and individuals at 31.40 and 63.04%, respectively, via the AMOVA test, and a relatively significant positive correlation was observed among only the temperate populations via IBD analysis (R2 = 0.6614, p = 0.048). Recent dispersions were observed among different Ae. albopictus populations, and four major migration trends with high gene flow (Nm > 0.4) were reconstructed between the tropical region and the other two regions. Environmental factors, especially temperature and rainfall, may be the leading causes of genetic diversity in different climatic regions. Conclusions Continuous dispersion contributes to the genetic communication of Ae. albopictus populations across different climatic regions, and environmental factors, especially temperature and rainfall, may be the leading causes of genetic variation. Graphical abstract

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Section: Discussionmentioning

confidence: 99%

“…An important and rapidly adapting insect with high fecundity and a short life cycle, Ae. albopictus has population dynamics and vector competence that are also greatly influenced by environmental conditions [ 9 , 10 ]. Numerous previous studies have discussed the effects of environmental variations on Ae.…”

Section: Introductionmentioning

confidence: 99%

Dispersal patterns and population genetic structure of Aedes albopictus (Diptera: Culicidae) in three different climatic regions of China

et al. 2021

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“…An important and rapidly adapting insect with high fecundity and a short life cycle, as Ae. albopictus has population dynamics and vector competence that are also greatly in uenced by environmental conditions [9,10]. Numerous previous studies have discussed the effects of environmental variations on Ae.…”

mentioning

confidence: 99%

Dispersal patterns and population structure of Aedes albopictus (Diptera: Culicidae) in three different climatic regions of China

Gao

Zhang

Guo

et al. 2020

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Background:Aedes albopictus is an indigenous primary vector for Dengue and Zika viruses in China. Compared with its insecticide resistance, biology, and vector competence, little is known about its genetic variation, which corresponds to environmental variations. Thus, the present study examines how Ae. albopictus varies among different climatic regions in China and deciphers its potential dispersal patterns.Methods:The genetic variation and population structure of 17 Ae. albopictus populations collected from three climatic regions of China were investigated with 11 microsatellite loci and the mitochondrial coxI gene.Results:Of 44 isolated microsatellite markers, 11 pairs were chosen for genotyping analysis and had an average PIC value of 0.713, representing high polymorphism. The number of alleles was high in each population, with the ne value increasing from the temperate region (3.876) to the tropical region (4.144). Twenty-five coxI haplotypes were detected, and the highest diversity was observed in the tropical region. The mean Ho value (ca. 0.557) of all the regions was significantly lower than the mean He value (ca. 0.684), with nearly all populations significantly departing from HWE and displaying significant population expansion (p-value < 0.05). Two genetically isolated groups and three haplotype clades were evaluated via STRUCTURE and haplotype phylogenetic analyses, and the tropical populations were significantly isolated from those in the other regions. Most genetic variation in Ae. albopictus was detected within populations and individuals at 31.40% and 63.04%, respectively, via the AMOVA test, and a relatively significant positive correlation was observed among only the temperate populations via IBD analysis (R2 = 0.6614, p = 0.048). Recent dispersions were observed among different Ae. albopictus populations, and four major migration trends with high gene flow (Nm>0.4) were reconstructed between the tropical region and the other two regions. Environmental factors, especially temperature and rainfall, may be the leading causes of genetic diversity in different climatic regions.Conclusions:Continuous dispersion contributes to the genetic communication of Ae. albopictus populations across different climatic regions, and environmental factors, especially temperature and rainfall, may be the leading causes of genetic variation.

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“…Mesmo A. aegypti sendo muito abundante nos ambientes urbano e periurbano, ela foi dominante somente no ambiente urbano, e isso refletiu nos resultados da análise de espécies indicadoras (IndVal), pois essa análise leva em consideração valores de abundância e frequência de ocorrência de uma espécie em um ambiente e, neste caso, A aegypti foi abundante e frequente nos dois ambientes. Isso poderia indicar que, apesar de ser uma espécie com alta preferência a ambientes urbanos, ela está respondendo de forma contínua e se adaptando a diferentes ambientes (Kweka et al 2019). Assim, a presença desta espécie também no ambiente rural pode indicar que mudanças ecológicas causadas pelo desenvolvimento agrícola favorecem a ocorrência de vetores emergentes nestes locais (Forattini 1998).…”

Section: Discussionunclassified

Estrutura De Comunidades E Espécies Indicadoras De Culicídeos (Diptera: Nematocera) Em Ambientes Com Diferentes Graus De Impacto Ambiental

et al. 2020

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Os culicídeos são insetos hematófagos chamados de mosquitos. Eles são vetores responsáveis pela transmissão de diversos patógenos aos animais e ao homem. As fêmeas destes dípteros fazem oviposição em recipientes introduzidos pelo humano no ambiente natural. Estes reservatórios de água transformam-se em novos criadouros. Desta forma, o objetivo desta pesquisa é descrever a diversidade de espécies de culicídeos no município de Ribeirão Claro, Paraná, encontradas em criadouros artificiais instalados em ambientes com diferentes níveis de impacto antrópico. Foram instaladas armadilhas em quatro pontos da cidade com características urbanas, periurbanas, rurais e silvestres respectivamente e em cada ponto distribuíram-se três recipientes artificiais para servir de criadouros. A captura das larvas nestes recipientes foi realizada quinzenalmente, sendo o período de coleta desenvolvido de fevereiro a setembro de 2018. As métricas de comunidade realizadas foram: riqueza, abundância total e relativa, diversidade, equitabilidade, dominância e a similaridade. Também foi analisada a presença de espécies indicadoras para cada ambiente avaliado. Foram coletados 472 culicídeos imaturos, distribuídos nos taxa: Aedes aegypti (Linnaeus, 1762), Aedes albopictus (Skuse, 1894), Culex quinquefasciatus Say, 1823, Culex coronator Dyar & Knab, 1906, Toxorhynchites sp., Anopheles argyritarsis Robineau-Desvoidy, 1827, Aedes fluviatilis (Lutz, 1904) e Uranotaenia sp. A maior abundância ocorreu na área periurbana sendo a espécie Aedes aegypti a de maior ocorrência. Foram apontados como bioindicadores o Aedes aegypti para o ambiente periurbano, o Aedes albopictus para a área rural e o Toxorhynchites sp. para o ambiente silvestre. A maior riqueza e diversidade foram observadas no ambiente silvestre mostrando que alterações nestes locais podem favorecer a presença de insetos de importância para a saúde pública.

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Ecology of Aedes Mosquitoes, the Major Vectors of Arboviruses in Human Population

Cited by 26 publications

References 51 publications

Dispersal patterns and population genetic structure of Aedes albopictus (Diptera: Culicidae) in three different climatic regions of China

Dispersal patterns and population genetic structure of Aedes albopictus (Diptera: Culicidae) in three different climatic regions of China

Dispersal patterns and population structure of Aedes albopictus (Diptera: Culicidae) in three different climatic regions of China

Estrutura De Comunidades E Espécies Indicadoras De Culicídeos (Diptera: Nematocera) Em Ambientes Com Diferentes Graus De Impacto Ambiental

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