1. Modelling the risk of being bitten by malaria vectors in a vector control area in southern Benin, west Africa
- Author
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Fabrice Chandre, Vincent Corbel, Hélène Guis, Nicolas Moiroux, Armel Djènontin, Abdul S Bio-Bangana, Maladies infectieuses et vecteurs : écologie, génétique, évolution et contrôle (MIVEGEC), Institut de Recherche pour le Développement (IRD [France-Sud])-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM), CREC, Minist Sante, Fac Agr, Dept Entomol, Kasetsart University, Contrôle des maladies animales exotiques et émergentes (UMR CMAEE), Institut National de la Recherche Agronomique (INRA)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), French ministry of foreign affairs through the SCAC programme, IRD, EU [FP7-261504 EDENext], European Project: 261504, Vector Control Group (MIVEGEC-VCG), Evolution des Systèmes Vectoriels (ESV), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Maladies infectieuses et vecteurs : écologie, génétique, évolution et contrôle (MIVEGEC), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), Kasetsart University (KU), and Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)
- Subjects
Entomology ,Mosquito Control ,Anopheles gambiae ,[SDV]Life Sciences [q-bio] ,Climate ,L73 - Maladies des animaux ,0302 clinical medicine ,Statistics ,Benin ,0303 health sciences ,Vector control ,biology ,U10 - Informatique, mathématiques et statistiques ,Ecology ,Anopheles ,Remote sensing ,3. Good health ,Mosquito control ,Infectious Diseases ,Sympatric speciation ,Area Under Curve ,Female ,Seasons ,L72 - Organismes nuisibles des animaux ,Risk ,030231 tropical medicine ,Host-vector contact ,Modelling ,Host-Parasite Interactions ,03 medical and health sciences ,Spatio-Temporal Analysis ,parasitic diseases ,medicine ,Animals ,Humans ,Malaria ,030304 developmental biology ,Models, Statistical ,Research ,Insect Bites and Stings ,medicine.disease ,biology.organism_classification ,Insect Vectors ,ROC Curve ,Parasitology ,Scale (map) - Abstract
Background: The diversity of malaria vector populations, expressing various resistance and/or behavioural patterns could explain the reduced effectiveness of vector control interventions reported in some African countries. A better understanding of the ecology and distribution of malaria vectors is essential to design more effective and sustainable strategies for malaria control and elimination. Here, we analyzed the spatio-temporal risk of the contact between humans and the sympatric An. funestus and both M and S molecular forms of An. gambiae s.s. in an area of Benin with high coverage of vector control measures with an unprecedented level of resolution. Methods: Presence-absence data for the three vectors from 1-year human-landing collections in 19 villages were assessed using binomial mixed-effects models according to vector control measures and environmental covariates derived from field and remote sensing data. After 8-fold cross-validations of the models, predictive maps of the risk of the contact between humans and the sympatric An. funestus and both molecular M and S forms of An. gambiae s.s. were computed. Results: Model validations showed that the An. funestus, An. gambiae M form, and S form models provided an excellent (Area Under Curve>0.9), a good (AUC>0.8), and an acceptable (AUC>0.7) level of prediction, respectively. The distribution area of the probability of contact between human and An. funestus largely overlaps that of An. gambiae M form but this latter showed important seasonal variation. An. gambiae S form also showed seasonal variation but with different ecological preferences. Landscape data were useful to discriminate between the species' distributions. Conclusions: These results showed that available remote sensing data could help in predicting the human-vector contact for several species of malaria vectors at a village level scale. The predictive maps showed seasonal and spatial variations in the risk of human-vector contact for all three vectors. Such maps could help Malaria Control Programmes to implement more effective vector control strategy by taking into account to the dynamics of malaria vector species.
- Published
- 2013
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