Title |
Aedes aegypti Mosquitoes Exhibit Decreased Repellency by DEET following Previous Exposure
|
---|---|
Published in |
PLOS ONE, February 2013
|
DOI | 10.1371/journal.pone.0054438 |
Pubmed ID | |
Authors |
Nina M. Stanczyk, John F. Y. Brookfield, Linda M. Field, James G. Logan |
Abstract |
DEET (N,N-Diethyl-m-toluamide) is one of the most widely used mosquito repellents. Although DEET has been shown to be extremely effective, recent studies have revealed that certain individual insects are unaffected by its presence. A genetic basis for this has been shown in Aedes aegypti mosquitoes and the fruit fly Drosophila melanogaster, but, for the triatomine bug, Rhodnius prolixus, a decrease in response to DEET occurred shortly after previous exposure, indicating that non-genetic factors may also be involved in DEET "insensitivity". In this study, we examined host-seeking behaviour and electrophysiological responses of A. aegypti after pre-exposure to DEET. We found that three hours after pre-exposure the mosquitoes showed behavioural insensitivity, and electroantennography revealed this correlated with the olfactory receptor neurons responding less to DEET. The change in behaviour as a result of pre-exposure to DEET has implications for the use of repellents and the ability of mosquitoes to overcome them. |
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Mexico | 1 | 2% |
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France | 1 | <1% |
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Neuroscience | 7 | 4% |
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