Anomalous High Rainfall and Soil Saturation as Combined Risk Indicator of Rift Valley Fever Outbreaks, South Africa, 2008–2011
Roy Williams , Johan Malherbe, Harold Weepener, Phelix Majiwa, and Robert Swanepoel
Author affiliations: Agricultural Research Council–Onderstepoort Veterinary Institute, Onderstepoort, South Africa (R. Williams, P. Majiwa); Agricultural Research Council–Institute for Soil, Climate and Water, Pretoria, South Africa (J. Malherbe, H. Weepener); University of Pretoria, Onderstepoort (R. Swanepoel)
Figure 8. Risk maps for probability of Rift Valley fever (RVF) outbreaks in different areas of South Africa. A) Map for December 2009 showing subsequent outbreaks in January 2010. B) Map for January 2010 showing subsequent outbreaks in February 2010. C) Map for February 2010 indicating irrigation areas and subsequent outbreaks during March–June 2010.
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