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Ecology of Gene Drives: The Role of Density-Dependent Feedbacks on the Efficacy and Dynamics of Two-Locus Underdominance Gene Drive Systems.
Evol Appl
March 2025
Mathematical Ecology Research Group, Department of Biology University of Oxford Oxford UK.
Density dependence describes the regulation of population growth rate by population density. This process is widely observed in insect populations, including vectors such as mosquitoes and agricultural pests that are targets of genetic biocontrol using gene drive technologies. While there continues to be rapid advancement in gene drive molecular design, most studies prioritise gene drive efficacy over ecology, and the role of density-dependent feedback on gene drives remains neglected.
View Article and Find Full Text PDFRisk assessment of an Aedes flavivirus and its effect on pathogenic flavivirus replication in mosquitoes.
Parasit Vectors
March 2025
State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.
Background: Mosquitoes are efficient vectors of medically significant flaviviruses and serve as hosts for insect-specific flaviviruses (ISFs). Aedes flavivirus (AEFV) is a classical ISF. Given the increasing discovery of ISFs, it is urgent to evaluate the potential risk of ISFs to human health as well as their impact on the transmission of pathogenic flaviviruses.
View Article and Find Full Text PDFImplications for malaria transmission: a cross-sectional study on the bionomics and susceptibility of local malaria vectors in urban and periurban settings of Ndola district.
BMJ Open
March 2025
Biomedical Sciences, University of Zambia - Ridgeway Campus, Lusaka, Zambia.
Objectives: To assess vector behaviour and phenotypic resistance for effective vector control programming.
Design: This was a cross-sectional study.
Setting: This study was conducted in the urban and periurban areas of Ndola district, Zambia.
Incorporating adult age into mosquito population models: implications for predicting abundances in changing climates.
J Theor Biol
March 2025
School of Mathematics and Statistics, University of Glasgow, Glasgow, G12 8QQ, United Kingdom; Boyd Orr Centre for Population and Ecosystem Health, University of Glasgow, Glasgow, G12 8QW, UK.
Mosquito-borne diseases (MBDs) pose increasing threats under future climate change scenarios and an understanding of mosquito population dynamics is pivotal to predicting future risk of MBDs. Most models that describe mosquito population dynamics often assume that adult life-history is independent of adult age and yet mosquito senescence is known to affect mosquito mortality, fecundity and other key biological traits. Despite this, little is known about the effects of adult age at the level of the mosquito population, especially under varying temperature scenarios.
View Article and Find Full Text PDFSignificant variations in tolerance to clothianidin and pirimiphos-methyl in and populations during a dramatic malaria resurgence despite sustained indoor residual spraying in Uganda.
bioRxiv
February 2025
Department of Vector Biology, Liverpool School of Tropical Medicine, Liverpool, L3 5QA, United Kingdom.
A dramatic malaria resurgence occurred in areas of Uganda between 2020 and 2022 coincident with the switch to clothianidin-based formulations for indoor residual spraying. During the resurgence, numbers increased but when an alternative insecticide, pirimiphos methyl, was reintroduced in 2023, both malaria cases and mosquito density fell. In this study, we investigated possible causes of the resurgence by assessing; 1) whether sufficient quantities of insecticide were sprayed; 2) the residual insecticide bioefficacy against wild mosquitoes and; 3) the insecticide susceptibility of vector populations using standard test tube assays and wall cone assays.
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