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Moiroux Nicolas, Djenontin Armel, Bio-Bangana A. S., Chandre Fabrice, Corbel Vincent, Guis H. (2014). Spatio-temporal analysis of abundances of three malaria vector species in southern Benin using zero-truncated models. Parasites and Vectors, 7, art. 103. ISSN 1756-3305

Fichier PDF disponiblehttp://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers17-10/010061968.pdf[ PDF Link ]

Lien direct chez l'éditeur doi:10.1186/1756-3305-7-103

Titre
Spatio-temporal analysis of abundances of three malaria vector species in southern Benin using zero-truncated models
Année de publication2014
Type de documentArticle référencé dans le Web of Science WOS:000335074900001
AuteursMoiroux Nicolas, Djenontin Armel, Bio-Bangana A. S., Chandre Fabrice, Corbel Vincent, Guis H.
SourceParasites and Vectors, 2014, 7, p. art. 103. p. art. 103 ISSN 1756-3305
RésuméBackground: A better understanding of the ecology and spatial-temporal distribution of malaria vectors is essential to design more effective and sustainable strategies for malaria control and elimination. In a previous study, we analyzed presence-absence data of An. funestus, An. coluzzii, and An. gambiae s.s. in an area of southern Benin with high coverage of vector control measures. Here, we further extend the work by analysing the positive values of the dataset to assess the determinants of the abundance of these three vectors and to produce predictive maps of vector abundance. Methods: Positive counts of the three vectors were assessed using negative-binomial zero-truncated (NBZT) mixed-effect models according to vector control measures and environmental covariates derived from field and remote sensing data. After 8-fold cross-validation of the models, predictive maps of abundance of the sympatric An. funestus, An. coluzzii, and An. gambiae s.s. were produced. Results: Cross-validation of the NBZT models showed a satisfactory predictive accuracy. Almost all changes in abundance between two surveys in the same village were well predicted by the models but abundances for An. gambiae s.s. were slightly underestimated. During the dry season, predictive maps showed that abundance greater than 1 bite per person per night were observed only for An. funestus and An. coluzzii. During the rainy season, we observed both increase and decrease in abundance of An. funestus, which are dependent on the ecological setting. Abundances of both An. coluzzii and An. gambiae s. s. increased during the rainy season but not in the same areas. Conclusions: Our models helped characterize the ecological preferences of three major African malaria vectors. This works highlighted the importance to study independently the binomial and the zero-truncated count processes when evaluating vector control strategies. The study of the bio-ecology of malaria vector species in time and space is critical for the implementation of timely and efficient vector control strategies.
Plan de classementEntomologie médicale / Parasitologie / Virologie [052] ; Sciences fondamentales / Techniques d'analyse et de recherche [020]
Descr. géo.BENIN
LocalisationFonds IRD [F B010061968]
Identifiant IRDfdi:010061968
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010061968

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