Effect of six rounds of mass drug administration (MDA) on
microfilaria prevalence. Brown line = all four hamlets of Kirare in survey 1-6; Green line = two hamlets of Kirare (Mtambuuni, Mashine) in survey 1-8; Red lines = one hamlet of Kiomoni (Mabavu) and one hamlet of Kisimatui (Majengo) in survey 7 and 8. In survey 1-6 all individuals ≥ 1 year were examined for mf. In survey 7 and 8 all individuals ≥ 1 year were first examined for CFA, and those positive were examined for mf. Vertical stippled lines indicate rounds of MDA.