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 7. Risk map for probability of Rift Valley fever (RVF) outbreaks in different areas of South Africa. Map for September 2009 indicates irrigation areas and subsequent outbreaks during October–December 2009.
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