• Rift Valley fever in a zone potentially occupied by Aedes vexans in Senegal : dynamics and risk mapping

    Extract of Geospatial Health - Volume 3, Number 2 May 2009, Pages 211-220
    Cécile Vignolles , Jean-Pierre Lacaux , Yves M. Tourre , Guillaume Bigeard [2], Jacques-André Ndione , Murielle Lafaye [1]
    This paper presents an analysis of the interaction between the various variables associated with Rift Valley fever (RVF) such as the mosquito vector, available hosts and rainfall distribution. To that end, the varying zones potentially occupied by mosquitoes (ZPOM), rainfall events and (...)

    Published: 2009/05/18
  • Classification of ponds from high-spatial resolution remote sensing

    Extract of Remote Sensing of Environment 106 (2007) 66-74. Article write by the teams of Media-France ; For more information do not hesitate to contact us.
    J.P. Lacaux , Y.M. Tourre ,C. Vignolles, J.A. Ndione M. Lafaye
    Abstract During the rainy season the abundance of mosquitoes over the Ferlo region (Senegal) is linked to dynamic, vegetation cover and turbidity of temporary and relatively small ponds. The latter create a variable environment where mosquitoes can thrive and thus (...)

    Published: 2010/02/03
  • GIS and High-Resolution Remote Sensing Improve Early Warning Planning for Mosquito-Borne Epidemics

    Extract of HealthyGIS ; november 2007
    By Yves M. Tourre, Delphine Fontannaz, Cécile Vignolles, Jacques-André Ndione, Jean-Pierre Lacaux, and Murielle Lafaye
    Fifty years of successful efforts in the prevention and control of infectious diseases and epidemics have inspired confidence and optimism in modern medicine and technology. Nevertheless, epidemics remain a conspicuous challenge to public health today. In the context of climate change and rapidly increasing population, some epidemics (...)

    Published: 2010/02/03
  • What is AdaptFVR project ?

    AdaptFVR project’ aim to study the climates change impacts on Senegal emerging Rift Valley Fever (RVF). This project also aim to study the required strategies for a better cattle management in Sahel.
    The CNES remote epidemiology conceptual approach applied to the Rift Valley Fever in the Senegal Ferlo region during 2003 season allowed to produce cattle RVF exposure dynamic risk maps including as primary inputs the rain events, the vector (Aedes vexans and Culex poicilipes) density and the (...)

    Published: 2009/06/02
  • Monitoring from space

    Anomalous climatic conditions are recognized to be linked with outbreaks of various human and livestock diseases in various countries (Nicholls, 1991 ).
    Vegetation in semi-arid and arid regions responds quickly to rainfall, and anomalous landcover conditions can be quickly mapped over large areas. For example indices such as the normalized difference vegetation index (NDVI) can been obtained rapidly in order to identify regions where conditions are suitable for the development of RVF (...)

    Published: 2007/11/06
  • What is PaluSat project ?

    PALUSAT projectis an initiative of the French Spatial Agency and the French Armed Forces Biomedical Research Institute. Main objective is to set up an operational predicting spatial and temporal tool for malaria risk using remote sensing information.
    Malaria epidemiology
    The number of malaria cases, the exposed population and the spatial and temporal distribution of the disease are driven by 2 different types of factors : intrinsic and extrinsic. The intrinsic factors relate to the (...)

    Published: 2008/05/21