Rift valley fever, disease ecology and early warning

De La Rocque Stéphane, Formenty Pierre. 2010. Rift valley fever, disease ecology and early warning. In : Sustainable improvement of animal production and health. Odongo N.E. (ed.), Garcia M. (ed.), Viljoen Gerrit J. (ed.). FAO. Rome : FAO, pp. 327-333. ISBN 978-92-5-106697-3 International Symposium on Sustainable Improvement of Animal Production and Health, Vienne, Autriche, 8 June 2009/11 June 2009.

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Abstract : Rift Valley fever (RVF) once again dramatically affected the Horn of Africa (Kenya, Somalia, and Tanzania) in 2006-2007. This outbreak was linked to unusual rainfall associated with climatic events (El Niño) which affected the populations of the mosquitoes acting as vectors and reservoirs of the disease. The disease also reappeared in Sudan in the autumn of 2007, following excessive rainfall driven by a post-El Niño and unusually warm sea temperatures in the Indian Ocean. In 2008, the disease affected southern African countries (Swaziland, South Africa) and islands in the Indian Ocean (Comoros, Mayotte Island, Madagascar). Based on near real-time climatic data, forecasting models and early warning systems were available at the continental level and proved to be efficient in raising the alert before the onset of the epidemic, at least for the coastal countries of eastern Africa. These recent events provided an opportunity to review the natural history of RVF, especially in some places where its ecology was poorly documented. FAO and WHO officers used outcomes from the different models and then identified gaps or needs that could be filled in order to improve the use of these predictions. A brainstorming meeting was organised in Rome in September 2008 to discuss adjustments and complementarities to the existing models, as forecasting and early warning systems are the keys that may provide a time window for preventive measures before amplification of the virus is out of control. (Résumé d'auteur)

Mots-clés Agrovoc : Virus de la fièvre de la vallée du Rift, Changement climatique, Fièvre de la Vallée du Rift

Mots-clés géographiques Agrovoc : Afrique

Classification Agris : P40 - Meteorology and climatology
L73 - Animal diseases

Auteurs et affiliations

  • De La Rocque Stéphane, CIRAD-BIOS-DIR (ITA)
  • Formenty Pierre, OMS (CHE)

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