Topographic mapping of the interfaces between human and aquatic mosquito habitats to enable barrier targeting of interventions against malaria vectors
| Autor: | Gerry F. Killeen, Daniel Msellemu, Nicodem J. Govella, Benn Sartorius, Stefan Dongus, Alex J. Limwagu, Yeromin P. Mlacha, Victoria M. Mwakalinga, Prosper P Chaki, Maureen Coetzee |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
spatial modelling
Anopheles gambiae 030231 tropical medicine Plasmodium falciparum malaria Fencing wa_110 03 medical and health sciences 0302 clinical medicine parasitic diseases medicine Earth Science 030212 general & internal medicine Malaria vector lcsh:Science geophysical topography barrier-targeted interventions Multidisciplinary biology Ecology Infection prevalence Anopheles biology.organism_classification medicine.disease wc_750 Habitat qx_650 qx_510 Vector (epidemiology) lcsh:Q Malaria Research Article |
| Zdroj: | Royal Society Open Science Royal Society Open Science, Vol 5, Iss 5 (2018) |
| ISSN: | 2054-5703 |
| Popis: | Geophysical topographic metrics of local water accumulation potential are freely available and have long been known as high-resolution predictors of where aquatic habitats for immature Anopheles mosquitoes are most abundant, resulting in elevated densities of adult malaria vectors and human infection burden. Using existing entomological and epidemiological survey data, here we illustrate how topography can also be used to map out the interfaces between wet, unoccupied valleys and dry, densely populated uplands, where malaria vector densities and infection risk are focally exacerbated. These topographically identifiable geophysical boundaries experience disproportionately high vector densities and malaria transmission risk, because this is where Anopheles mosquitoes first encounter humans when they search for blood after emerging or ovipositing in the valleys. Geophysical topographic indicators accounted for 67% of variance for vector density but for only 43% for infection prevalence, so they could enable very selective targeting of interventions against the former but not the latter (targeting ratios of 5.7 versus 1.5 to 1, respectively). So, in addition to being useful for targeting larval source management to wet valleys, geophysical topographic indicators may also be used to selectively target adult Anopheles mosquitoes with insecticidal residual sprays, fencing, vapour emanators or space sprays to barrier areas along their fringes. |
| Databáze: | OpenAIRE |
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