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Rift Valley fever in West Africa: the role of space in endemicity

Rift Valley fever in West Africa: the role of space in endemicity Summary Rift Valley fever is an endemic vector‐borne disease in West Africa, which mainly affects domestic ruminants and occasionally humans. The aetiological mechanisms of its endemicity remain under debate. We used a simple spatially explicit model to assess the possibility of endemicity without wild animals providing a permanent virus reservoir. Our model takes into account the vertical transmission in some mosquito species, the rainfall‐driven emergence of their eggs and local and distant contacts because of herd migration. Endemicity without such a permanent virus reservoir would be impossible in a single site except when there is a strictly periodic rainfall pattern; but it would be possible when there are herd movements and sufficient inter‐site variability in rainfall, which drives mosquito emergence. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Tropical Medicine & International Health Wiley

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References (39)

Publisher
Wiley
Copyright
Copyright © 2006 Wiley Subscription Services, Inc., A Wiley Company
ISSN
1360-2276
eISSN
1365-3156
DOI
10.1111/j.1365-3156.2006.01746.x
pmid
17176353
Publisher site
See Article on Publisher Site

Abstract

Summary Rift Valley fever is an endemic vector‐borne disease in West Africa, which mainly affects domestic ruminants and occasionally humans. The aetiological mechanisms of its endemicity remain under debate. We used a simple spatially explicit model to assess the possibility of endemicity without wild animals providing a permanent virus reservoir. Our model takes into account the vertical transmission in some mosquito species, the rainfall‐driven emergence of their eggs and local and distant contacts because of herd migration. Endemicity without such a permanent virus reservoir would be impossible in a single site except when there is a strictly periodic rainfall pattern; but it would be possible when there are herd movements and sufficient inter‐site variability in rainfall, which drives mosquito emergence.

Journal

Tropical Medicine & International HealthWiley

Published: Dec 1, 2006

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