Fig 1. Comparison of the model-predicted and observed pre-treatment association between microfilaraemia (Mf) and circulating filarial antigenaemia (CFA) prevalence at community-level.

Observed data are from villages in the annual and biannual treatment arms in Côte d’Ivoire (triangles) and Liberia (squares), with CFA prevalences assessed using either the filarial test strip (FTS, black) or the immunochromatographic card test (ICT, white). FTS- and ICT-based observations made in the same community are connected via black dotted lines. Model predictions (dots) are shown for settings without (dark blue) and with (light blue) an external force of infection.