Performance of localised epidemic definitions in predicting annual meningitis incidences at health centre level. The different marks represent sensibility and 1-specificity of eight localised epidemic definitions in predicting annual incidences of suspected meningitis at the health centre level in Hauts-Bassins and Centre Nord sanitary region, Burkina Faso, 2004-2008. Full and bold marks represent the performance in predicting annual incidences ≥ 0.4%. Empty or faint marks represent the performance in predicting annual incidences ≥ 0.8%. Definitions for localised epidemics are:- the recommended threshold for epidemic response applied to health centre level data (oblique cross, RT@HC); or - based on different thresholds of weekly incidence rates per 100,000 inhabitants [≥ 25 (bar), ≥ 50 (big circle), ≥ 75 (straight cross, FE75), ≥ 100 (triangle), ≥ 150 (diamond), ≥ 200, (small circles), ≥ 250 (squares)] with incidences maintained during ≥ 2 weeks and with ≥ 5 cases per week.