Contrasting patterns of tolerance between chemical and biological insecticides in mosquitoes exposed to UV-A

Tetreau, Guillaume; Chandor-Proust, Alexia; Faucon, Frédéric; Stalinski, Renaud; Akhouayri, Idir; Prudhomme, Sophie; Raveton, Muriel; Reynaud, Stéphane

doi:10.1016/j.aquatox.2013.07.004

Cited by 8 publications

(6 citation statements)

References 73 publications

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“…PAHs alter mosquito metabolism, increasing their tolerance to synthetic pesticides while causing no significant toxicity ( Poupardin et al., 2012 ). Furthermore, exposing mosquito larvae to UV-A throughout their larval development enhanced detoxifying enzymes as well as epigenetics in accordance with an earlier reported ( Tetreau et al., 2013 ). As a result, sunlight exposure may have a significant impact on the efficacy of insecticide-based mosquito control methods.…”

Section: Introductionsupporting

confidence: 91%

“…quinquefasciatus larvae. Before being used in our studies, 250 larvae were randomly selected and exposed to Nitro-PAH (Nitro-anthracene) for 24 h at different concentration (0.001–0.008 ppm), with 1-h exposure to UV-B light and the control and Nitro-PHA only ( Tetreau et al., 2013 ; WHO, 1998 ). The samples were stored at −80 °C for further studies.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Pretreatment of mosquito larvae with ultraviolet-B and nitropolycyclic aromatic hydrocarbons induces increased sensitivity to permethrin toxicity

Ramkumar

Ramesh²,

Narayanan³

et al. 2022

Heliyon

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Section: Introductionsupporting

confidence: 91%

Section: Methodsmentioning

confidence: 99%

Pretreatment of mosquito larvae with ultraviolet-B and nitropolycyclic aromatic hydrocarbons induces increased sensitivity to permethrin toxicity

Ramkumar

Ramesh²,

Narayanan³

et al. 2022

Heliyon

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“…Besides current and efficient insecticide-based control programs [52-54], alternative approaches such as vector biocontrol have been encouraged to anticipate and mitigate the emergence of insecticide resistance [55,56]. In addition, insecticide susceptibility and susceptibility to microbial agents have been frequently shown to negatively correlate, suggesting that biocontrol, although not yet assessed at a large scale, could become part of malaria integrated management control programs [57,58]. …”

Section: Discussionmentioning

confidence: 99%

Melanotic Pathology and Vertical Transmission of the Gut Commensal Elizabethkingia meningoseptica in the Major Malaria Vector Anopheles gambiae

2013

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BackgroundThe resident gut flora is known to have significant impacts on the life history of the host organism. Endosymbiotic bacterial species in the Anopheles mosquito gut are potent modulators of sexual development of the malaria parasite, Plasmodium, and thus proposed as potential control agents of malaria transmission.ResultsHere we report a melanotic pathology in the major African malaria vector Anopheles gambiae, caused by the dominant mosquito endosymbiont Elizabethkingia meningoseptica . Transfer of melanised tissues into the haemolymph of healthy adult mosquitoes or direct haemolymph inoculation with isolated E . meningoseptica bacteria were the only means for transmission and de novo formation of melanotic lesions, specifically in the fat body tissues of recipient individuals. We show that E . meningoseptica can be vertically transmitted from eggs to larvae and that E . meningoseptica -mono-associated mosquitoes display significant mortality, which is further enhanced upon Plasmodium infection, suggesting a synergistic impact of E . meningoseptica and Plasmodium on mosquito survival.ConclusionThe high pathogenicity and permanent association of E . meningoseptica with An. Gambiae through vertical transmission constitute attractive characteristics towards the potential design of novel mosquito/malaria biocontrol strategies.

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“…The toxicity of Cry1Ac and deltamethrin against the respective resistant lines was significantly increased by an inhibitor of insect esterases, but such synergism was not observed in the unselected line, suggesting that selected and induced responses to insecticide exposure rely on different mechanisms. A recent study revealed that UV-exposed mosquitoes (Bora-Bora strain) exhibited higher levels of detoxification activities and were more tolerant to chemical insecticides, but more susceptible to Bti-toxins [16], suggesting an immediate metabolic compensation between detoxifying activity and Bti resistance in the susceptible strain. However, in this study, Bti-selected strains were not more susceptible to chemical insecticides than the control strain, again suggesting that long-term evolutionary compensation and short-term metabolic response to insecticide exposure can involve distinct mechanisms.…”

Section: Resultsmentioning

confidence: 99%

Chemical and biological insecticides select distinct gene expression patterns in Aedes aegypti mosquito

et al. 2014

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Worldwide evolution of mosquito resistance to chemical insecticides represents a major challenge for public health, and the future of vector control largely relies on the development of biological insecticides that can be used in combination with chemicals (integrated management), with the expectation that populations already resistant to chemicals will not become readily resistant to biological insecticides. However, little is known about the metabolic pathways affected by selection with chemical or biological insecticides. Here we show that Aedes aegypti, a laboratory mosquito strain selected with a biological insecticide (Bacillus thuringiensis israelensis, Bti) evolved increased transcription of many genes coding for endopeptidases while most genes coding for detoxification enzymes were under-expressed. By contrast, in strains selected with chemicals, genes encoding detoxification enzymes were mostly over-expressed. In all the resistant strains, genes involved in immune response were under-transcribed, suggesting that basal immunity might be a general adjustment variable to compensate metabolic costs caused by insecticide selection. Bioassays generally showed no evidence for an increased susceptibility of selected strains towards the other insecticide type, and all chemical-resistant strains were as susceptible to Bti as the unselected parent strain, which is a good premise for sustainable integrated management of mosquito populations resistant to chemicals.

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Contrasting patterns of tolerance between chemical and biological insecticides in mosquitoes exposed to UV-A

Cited by 8 publications

References 73 publications

Pretreatment of mosquito larvae with ultraviolet-B and nitropolycyclic aromatic hydrocarbons induces increased sensitivity to permethrin toxicity

Pretreatment of mosquito larvae with ultraviolet-B and nitropolycyclic aromatic hydrocarbons induces increased sensitivity to permethrin toxicity

Melanotic Pathology and Vertical Transmission of the Gut Commensal Elizabethkingia meningoseptica in the Major Malaria Vector Anopheles gambiae

Chemical and biological insecticides select distinct gene expression patterns in Aedes aegypti mosquito

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