Figure 1: Patterns of TB exposure, prevalence of clinical signs and TB-related death over 27 years of research at the Kalahari Meerkat Project (South Africa) illustrating the inter-annual variation and development of TB prevalence within the study population. Absolute numbers (barplots) and proportion of A) meerkat groups and B) individuals of the study population being not exposed yet (green), exposed (blue), displaying clinical signs of TB (orange) or dying with confirmed TB (red). Means ± sd of each measure were calculated in 3-months increments.