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Adult vector control, mosquito ecology and malaria transmission.

Brady, O.J. and Godfray, H.C.J. and Tatem, A.J. and Gething, P.W. and Cohen, J.M. and McKenzie, F.E. and Perkins, T.A. and Reiner, R.C. and Tusting, L.S. and Scott, T.W. and Lindsay, S.W. and Hay, S.I. and Smith, D.L. (2015) 'Adult vector control, mosquito ecology and malaria transmission.', International health., 7 (2). pp. 121-129.


Background: Standard advice regarding vector control is to prefer interventions that reduce the lifespan of adult mosquitoes. The basis for this advice is a decades-old sensitivity analysis of ‘vectorial capacity’, a concept relevant for most malaria transmission models and based solely on adult mosquito population dynamics. Recent advances in micro-simulation models offer an opportunity to expand the theory of vectorial capacity to include both adult and juvenile mosquito stages in the model. Methods: In this study we revisit arguments about transmission and its sensitivity to mosquito bionomic parameters using an elasticity analysis of developed formulations of vectorial capacity. Results: We show that reducing adult survival has effects on both adult and juvenile population size, which are significant for transmission and not accounted for in traditional formulations of vectorial capacity. The elasticity of these effects is dependent on various mosquito population parameters, which we explore. Overall, control is most sensitive to methods that affect adult mosquito mortality rates, followed by blood feeding frequency, human blood feeding habit, and lastly, to adult mosquito population density. Conclusions: These results emphasise more strongly than ever the sensitivity of transmission to adult mosquito mortality, but also suggest the high potential of combinations of interventions including larval source management. This must be done with caution, however, as policy requires a more careful consideration of costs, operational difficulties and policy goals in relation to baseline transmission.

Item Type:Article
Keywords:Larval control, Malaria control policy, Micro-simulation models, Plasmodium falciparum, Plasmodium vivax, Vectorial capacity.
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Publisher statement:© The Author 2015. Published by Oxford University Press on behalf of Royal Society of Tropical Medicine and Hygiene This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
Record Created:09 Jun 2015 09:50
Last Modified:09 Jun 2015 11:04

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