Vol. 3, Issue 5 (2018)
Seasonal implications of malaria and their correlations with meteorological parameters in the districts of indoor residual spray extension in north Benin, West Africa
Author(s): André Sominahouin, Germain Gil Padonou, Albert Sourou Salako, Laurent Iyikirenga, Martin Akogbéto
Abstract: Benin has chosen to continue the implementation of indoor residual spraying as a complementary strategy for the prevention of malaria and to continue its extension to other eligible communes from 2017 onwards. The aim of this study was to compare the results of the evolution of the monthly incidence of malaria obtained before and after the implementation of the Indoor Residual Spray (IRS) and their correlation with climatic parameters. Clinical and meteorological data collection was carried out respectively in the study's joint synoptic stations and health facilities in the Alibori and Donga departments where the houses were treated with pyrimiphosmethyl. Also the incidence is higher between the period from July to August (31% before the IRS and 27% after the IRS) followed by the period from November to October (30% before the IRS and 25% after the IRS). Evaporation and humidity contribute to the increase in malaria incidence while temperature and wind are metrological parameters that contribute to the decrease in incidence. The present study has shown, once again, the effectiveness of pyrimiphosmethyl on resistant anopheles populations especially the variation and the interaction between climatic factors determine the increase of malaria especially during the rainy season in the implementation of the IRS. Only a better understanding of these interactions between climate and health will lead to better strategies, policies and effective measures to deal with this environmental pathology.