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Hold your breath – Differential behavioral and sensory acuity of mosquitoes to acetone and carbon dioxide

Ghaninia, Majid and Majeed, Shahid and Dekker, Teun and Hill, Sharon and Ignell, Rickard (2019). Hold your breath – Differential behavioral and sensory acuity of mosquitoes to acetone and carbon dioxide. PLoS ONE. 14 , 1-14
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Abstract

Host seeking in the yellow fever mosquito, Aedes aegypti, and the African malaria mosquito, Anopheles coluzzii, relies on specific and generic host-derived odorants. Previous analyses indicate that the behavioral response of these species depends differentially on the presence of carbon dioxide (CO2) and other constituents in human breath for activation and attraction. In this study, we use a flight tube assay and electrophysiological analysis to assess the role of acetone, a major component of exhaled human breath, in modulating the behavioral and sensory neuronal response of these mosquito species, in the presence and absence of CO2. When presented alone at ecologically relevant concentrations, acetone increases attraction in Ae. aegypti, but not in An. coluzzii. Moreover, in combination with CO2, human breath-equivalents of acetone ranging between 0.1 and 10 ppm reproduces a behavioral response similar to that observed to human breath in host-seeking Ae. aegypti, but not in An. coluzzii. Acetone does, however, reduce attraction to CO2 in An. coluzzii, when presented at a higher concentration of 10 ppm. We identify the capitate peg A neuron of the maxillary palp of both species as a dual detector of CO2 and acetone. The sensory response to acetone, or binary blends of acetone and CO2, reflects the observed behavioral output in both Ae. aegypti and An. coluzzii. We conclude that host recognition is contextual and dependent on a combination of ecologically relevant odorants at naturally occurring concentrations that are encoded, in this case, by differences in the temporal structure of the neuronal response. This information should be considered when designing synthetic blends for that optimally attract mosquitoes for monitoring and control.

Authors/Creators:Ghaninia, Majid and Majeed, Shahid and Dekker, Teun and Hill, Sharon and Ignell, Rickard
Title:Hold your breath – Differential behavioral and sensory acuity of mosquitoes to acetone and carbon dioxide
Year of publishing :2019
Volume:14
Page range:1-14
Number of Pages:14
Publisher:PLoS
ISSN:1932-6203
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Zoology
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Behavioural Sciences Biology
Keywords:yellow fever mosquito, Aedes aegypti, African malaria mosquito, Anopheles coluzzii, host seeking, host specific odorants, ecologically relevant odorants
URN:NBN:urn:nbn:se:slu:epsilon-p-103676
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-103676
Additional ID:
Type of IDID
DOI10.1371/journal.pone.0226815
ID Code:16567
Faculty:LTV - Fakulteten för landskapsarkitektur, trädgårds- och växtproduktionsvetenskap
Department:(LTJ, LTV) > Department of Plant Protection Biology
Deposited By: SLUpub Connector
Deposited On:20 Feb 2020 08:30
Metadata Last Modified:20 Feb 2020 08:30

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