Chemical parameters and bacterial communities associated with larval habitats of Anopheles, Culex and Aedes mosquitoes (Diptera: Culicidae) in western Kenya

Onchuru, Thomas Ogao; Ajamma, Yvonne Ukamaka; Burugu, Marion; Kaltenpoth, Martin; Masiga, Daniel; Villinger, Jandouwe

doi:10.1017/s1742758416000096

Cited by 33 publications

(34 citation statements)

References 17 publications

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“…For example, increase of water temperature in breeding sites results in higher abundance of Betaproteobacteria and this correlates with higher abundance of Anopheles vs. Aedes spp. larvae (Hörtnagl et al, 2010; Onchuru et al, 2016). Anthropogenic activities also impact the bio-geochemical properties of breeding sites, and, in turn, affect mosquito microbiota.…”

Section: Factors That Shape Aedes Spp Microbiotamentioning

confidence: 99%

Aedes spp. and Their Microbiota: A Review

2019

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Aedes spp. are a major public health concern due to their ability to be efficient vectors of dengue, Chikungunya, Zika, and other arboviruses. With limited vaccines available and no effective therapeutic treatments against arboviruses, the control of Aedes spp. populations is currently the only strategy to prevent disease transmission. Host-associated microbes (i.e., microbiota) recently emerged as a promising field to be explored for novel environmentally friendly vector control strategies. In particular, gut microbiota is revealing its impact on multiple aspects of Aedes spp. biology, including vector competence, thus being a promising target for manipulation. Here we describe the technological advances, which are currently expanding our understanding of microbiota composition, abundance, variability, and function in the two main arboviral vectors, the mosquitoes Aedes aegypti and Aedes albopictus. Aedes spp. microbiota is described in light of its tight connections with the environment, with which mosquitoes interact during their various developmental stages. Unraveling the dynamic interactions among the ecology of the habitat, the mosquito and the microbiota have the potential to uncover novel physiological interdependencies and provide a novel perspective for mosquito control.

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Section: Factors That Shape Aedes Spp Microbiotamentioning

confidence: 99%

Aedes spp. and Their Microbiota: A Review

2019

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“…Water quality is critical for the choice of oviposition site for gravid females to ensure egg hatching and the development of their progeny from larvae to adults [6][7][8]. Females select breeding sites according to biotic and abiotic elements in the water, such as organic matter [8], bacteria [9,10], phosphate, ammonia and potassium [11][12][13], which are known to be closely related to the abundance of larvae and adults in the field [13][14][15]. Larvae in their aquatic habitats rely on bacteria communities and organic matter whose composition is highly variable depending on environmental fluctuations [16,17].…”

Section: Introductionmentioning

confidence: 99%

Natural Variation in Physicochemical Profiles and Bacterial Communities Associated with Aedes aegypti Breeding Sites and Larvae on Guadeloupe and French Guiana

et al. 2020

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Aedes aegypti develop in aquatic habitats in which mosquito larvae are exposed to physicochemical elements and microorganisms that may influence their life cycle and their ability to transmit arboviruses. Little is known about the natural bacterial communities associated with A. aegypti or their relation to the biotic and abiotic characteristics of their aquatic habitats. We characterized the physicochemical properties and bacterial microbiota of A. aegypti breeding sites and larvae on Guadeloupe and in French Guiana. In addition, we explored whether geographic location, the type of breeding site and physicochemical parameters influenced the microbiota associated with this mosquito species. We used large-scale 16S rRNA gene sequencing of 160 breeding sites and 147 pools of A. aegypti larvae and recorded 12 physicochemical parameters at the sampled breeding sites. Ordination plots and multiple linear regression were used to assess the influence of environmental factors on the bacterial microbiota of water and larvae. We found territory-specific differences in physicochemical properties (dissolved oxygen, conductivity) and the composition of bacterial communities in A. aegypti breeding sites that influenced the relative abundance of several bacteria genera (e.g., Methylobacterium, Roseoccocus) on the corresponding larvae. A significant fraction of the bacterial Electronic supplementary material The online version of this article (

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“…Mosquitoes typically utilize a variety of permanent and temporary water bodies for development. Female mosquitoes select oviposition sites based on location, physical habitat conditions, and water quality (Onchuru et al ), and the abundance of mosquito larvae may also be affected by predator abundance (Sunahara et al , Shaalan and Canyon , Benelli et al ). However, recent and rapid urbanization has contributed to the diversification of mosquito habitats, with temporary pools and artificial lentic habitats increasing in residential areas, and to the reduction of natural mosquito predators.…”

Section: Introductionmentioning

confidence: 99%

Relationships between predatory aquatic insects and mosquito larvae in residential areas in northern Thailand

Sareein

Phalaraksh

Rahong

et al. 2019

Journal of Vector Ecology

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In order to elucidate the poorly understood relationships between mosquito larvae and their predatory aquatic insects in urban and suburban areas of tropical Southeast Asia, where vector‐borne diseases are prevalent, aquatic insects were sampled from 14 aquatic habitats in residential areas of Chiang Mai, northern Thailand, during the rainy season (July to November) in 2016. Correlations among biological variables, densities of major predatory aquatic insect groups (i.e., Odonata, Coleoptera, and Hemiptera: OCH group) in wetlands and artificial lentic habitats, and the density of mosquito larvae were analyzed. Among the sampled mosquito larvae, Culex spp. were the most abundant, and both OCH density and water quality were major determinants of Culex spp. density (rs = −0.302 and −0.396, respectively). Logistic regression analyses indicated that the probability of Culex spp. occurrence was significantly and negatively correlated with OCH density. Furthermore, high macrophyte abundance was associated with higher predator density, potentially reducing mosquito density. Hemipteran predators were most negatively correlated with Culex spp. density, regardless of whether macrophyte abundance was high or low (rs = −0.547 and −0.533, respectively). Therefore, hemipteran predators were the most important aquatic insect predators in the urban and suburban residential areas of Chiang Mai, Thailand, and OCH species, such as the hemipteran Micronecta scutellaris, could be used as biological control agents against mosquitoes in the region.

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Chemical parameters and bacterial communities associated with larval habitats of Anopheles, Culex and Aedes mosquitoes (Diptera: Culicidae) in western Kenya

Cited by 33 publications

References 17 publications

Aedes spp. and Their Microbiota: A Review

Aedes spp. and Their Microbiota: A Review

Natural Variation in Physicochemical Profiles and Bacterial Communities Associated with Aedes aegypti Breeding Sites and Larvae on Guadeloupe and French Guiana

Relationships between predatory aquatic insects and mosquito larvae in residential areas in northern Thailand

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