Application of the Filariasis CELISA Antifilarial IgG_𝟒 Antibody Assay in Surveillance in Lymphatic Filariasis Elimination Programmes in the South Pacific

Figure 5

Mf, CFA, and antibody prevalence in children ≤10 years only across the health districts in Samoa. Similar to the data across all ages groups, Upolu had a significantly higher CFA prevalence in children than Savai’i (𝜒²=4.086; 𝑑𝑓=1; 𝑃=0.043). No differences for Mf prevalence were observed between the two island groups (𝜒²=1.514; 𝑑𝑓=1; 𝑃=0.218). Similarly, no significant differences for Mf prevalence were observed among the health districts (𝜒²=10.694; 𝑑𝑓=6; 𝑃=0.098), since Mf positive children were identified only in Leulumoega 1. Complementing this result, Leulumoega 1 recorded a significantly higher antibody (Ab) prevalence (*) than the other districts (𝜒²=20.6; 𝑑𝑓=6; 𝑃<0.001). The health districts of Aua, Leulumoega 2, Safotu, and Tuasivi recorded no CFA positive children. There were no significant differences for CFA prevalence in children among the health districts (𝜒²=2.612; 𝑑𝑓=2; 𝑃=0.271).