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Rainfall and epizootic Rift Valley fever

, : Rainfall and epizootic Rift Valley fever. Bulletin of the World Health Organization 63(5): 941-943

Epizootic Rift Valley fever (RVF) has occurred in Kenya four times over the last 30 years. Widespread, frequent, and persistant rainfall has been a feature of these epizootic periods. A composite statistic, based upon measurements of these rainfall characteristics, is positive during periods of epizootic Rift Valley fever. The heavy rainfall raises the level of the water table in certain areas, flooding the grassland depression (dambos) that are the habitat of the immature forms of certain ground-pool-breeding mosquitoes of the genus Aedes. RVF virus is probably transmitted transovarially in these species, very large numbers of which emerge under these damp conditions. This is when clinical signs of the disease are first seen.

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Accession: 006255530

PMID: 3879206

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