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- W2254122520 endingPage "e0004370" @default.
- W2254122520 startingPage "e0004370" @default.
- W2254122520 abstract "Most mosquito control efforts are primarily focused on reducing the adult population size mediated by reductions in the larval population, which should lower risk of disease transmission. Although the aim of larviciding is to reduce larval abundance and thus recruitment of adults, nonlethal effects on adults are possible, including transstadial effects on phenotypes of adults such as survival and pathogen infection and transmission. In addition, the mortality induced by control efforts may act in conjunction with other sources of mosquito mortality in nature. The consequences of these effects and interactions may alter the potential of the population to transmit pathogens. We tested experimentally the combined effects of a larvicide (Bacillus thuringiensis ssp. israelensis, Bti) and competition during the larval stages on subsequent Aedes aegypti (Linnaeus) traits, population performance, and susceptibility to dengue-1 virus infection. Ae. aegypti that survived exposure to Bti experienced accelerated development, were larger, and produced more eggs with increasing amounts of Bti, consistent with competitive release among surviving mosquitoes. Changing larval density had no significant interactive effect with Bti treatment on development and growth to adulthood. Larval density, but not Bti or treatment interaction, had a strong effect on survival of adult Ae. aegypti females. There were sharper declines in cumulative daily survival of adults from crowded than uncrowded larval conditions, suggesting that high competition conditions of larvae may be an impediment to transmission of dengue viruses. Rates of infection and dengue-1 virus disseminated infections were found to be 87±13% and 88±12%, respectively. There were no significant treatment effects on infection measurements. Our findings suggest that larvicide campaigns using Bti may reduce the number of emerged adults, but survivors will have a fitness advantage (growth, development, enhanced production of eggs) relative to conspecifics that are not under larvicide pressure. However, under most circumstances, these transstadial effects are unlikely to outweigh reductions in the adult population by Bti and altered risk of disease transmission." @default.
- W2254122520 created "2016-06-24" @default.
- W2254122520 creator A5022711435 @default.
- W2254122520 creator A5056522634 @default.
- W2254122520 date "2016-02-12" @default.
- W2254122520 modified "2023-10-11" @default.
- W2254122520 title "Transstadial Effects of Bti on Traits of Aedes aegypti and Infection with Dengue Virus" @default.
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- W2254122520 doi "https://doi.org/10.1371/journal.pntd.0004370" @default.
- W2254122520 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4752348" @default.
- W2254122520 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26871951" @default.
- W2254122520 hasPublicationYear "2016" @default.
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