Figure 3.

Seroprevalence of antibody against Rift Valley fever virus, by age category, among African buffalo in Kruger National Park during initial years 1–5 of the study (2001–2005). Bars indicate age-specific seroprevalence (in each year) for animal subgroups (defined as youngest group = 1–3 years of age; middle-low group = 3–5 years of age; middle-high group = 5–8 years of age; oldest group = more than 8 years of age) during that particular study year. Numbers above each bar indicate the number of animals that were tested in that age group in that study year.