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Understanding temporal shifts in mosquito host-seeking as drivers of behavioral resistance to insecticide-treated bed nets.

Objective

Mosquitoes transmit malaria parasites by feeding on humans, claiming approximately half a million lives each year. Insecticide-treated nets (ITNs) have been an effective method to reduce malaria mortality by protecting people from mosquito bites at night. However, mosquitoes are now changing their host-seeking behavior, biting before nightfall reducing ITN effectiveness. This project aims to understand the origins of these behavioral shifts using innovative methodologies. Two mechanisms are hypothesized to drive this shift: genetic evolution or phenotypic plasticity. ITNs may select for mosquitoes genetically hardwired to bite early, or mosquitoes might adapt behaviorally without genetic changes. These mechanisms have different implications for long-term ITN effectiveness and require different countermeasures. We currently lack the tools to accurately test these hypotheses.
I recently developed a behavioral assay to longitudinally monitor mosquito activity in the lab continuously over weeks. I now aim to adapt this method for field deployment to investigate temporal shifts in mosquito behavior in malaria-endemic regions with varying levels of ITN use. I will merge lab and field research through three objectives:
(1) Develop an assay to monitor mosquito host-seeking rhythms and environmental variables in the field.
(2) Deploy the assay in malaria-endemic areas with varying ITN exposure.
(3) Dissect the genetic and environmental factors driving host-seeking shifts in lab experiments.
The project combines my experience in biophysics and hardware development with Prof. Teun Bousema's expertise in malaria fieldwork, and Dr. Felix Hol's expertise in mosquito behavior to address the urgent issue of mosquito behavioral resistance to ITNs. This work will help design next-generation vector control strategies by understanding the factors driving behavioral shifts that diminish the effectiveness of ITNs.

Fields of science (EuroSciVoc)

CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: https://op.europa.eu/en/web/eu-vocabularies/euroscivoc.

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Coordinator

STICHTING RADBOUD UNIVERSITAIR MEDISCH CENTRUM
Net EU contribution
€ 217 076,16
Address
GEERT GROOTEPLEIN 10 ZUID
6525 GA Nijmegen
Netherlands

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Region
Oost-Nederland Gelderland Arnhem/Nijmegen
Activity type
Higher or Secondary Education Establishments
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