Timor-Leste reduced soil-transmitted helminth (STH) prevalence from 29% to 18% by 2020 through mass drug administration (MDA) in 2015–2019. School-based deworming was interrupted for nearly four years during the COVID-19 pandemic and resumed in 2022 in 3 municipalities and nationwide in 2024. We aimed to estimate STH prevalence, geographical distribution and associated factors following the re-introduction of MDA.
We conducted a cross-sectional, school-based survey from 26 February to 1 May 2025 across all 14 municipalities of Timor-Leste, sampling two schools per municipality and targeting 50 children between 6 and 14 years of age per school. We employed the Kato-Katz technique for stool sample analysis which is the WHO-recommended method for STH surveillance. Associations between STH infection and risk factors were assessed using univariate and multivariable logistic regression.
Out of 1960 children, 1236 (63·1%) provided analysable samples (615 [49·8%] girls, 621 [50·2%] boys); median age of the children was 8·7 years (IQR 8–10, range 6–14); ethnicity data was not available. Weighted national STH prevalence was 29·3% (95% CI 24·3–34·2), close to the 2012 baseline (29%) and above the 2020 figure (18%). Prevalence ranged from 2·2% (Oe-Cusse) to 91·5% (Manatuto). Ascaris lumbricoides accounted for 95·8% of infections; moderate-to-heavy infections affected 15·7% of children.
BT - The Lancet Regional Health - Southeast Asia DA - 11/2026 DO - 10.1016/j.lansea.2026.100870 LA - ENG M3 - Article N2 -Timor-Leste reduced soil-transmitted helminth (STH) prevalence from 29% to 18% by 2020 through mass drug administration (MDA) in 2015–2019. School-based deworming was interrupted for nearly four years during the COVID-19 pandemic and resumed in 2022 in 3 municipalities and nationwide in 2024. We aimed to estimate STH prevalence, geographical distribution and associated factors following the re-introduction of MDA.
We conducted a cross-sectional, school-based survey from 26 February to 1 May 2025 across all 14 municipalities of Timor-Leste, sampling two schools per municipality and targeting 50 children between 6 and 14 years of age per school. We employed the Kato-Katz technique for stool sample analysis which is the WHO-recommended method for STH surveillance. Associations between STH infection and risk factors were assessed using univariate and multivariable logistic regression.
Out of 1960 children, 1236 (63·1%) provided analysable samples (615 [49·8%] girls, 621 [50·2%] boys); median age of the children was 8·7 years (IQR 8–10, range 6–14); ethnicity data was not available. Weighted national STH prevalence was 29·3% (95% CI 24·3–34·2), close to the 2012 baseline (29%) and above the 2020 figure (18%). Prevalence ranged from 2·2% (Oe-Cusse) to 91·5% (Manatuto). Ascaris lumbricoides accounted for 95·8% of infections; moderate-to-heavy infections affected 15·7% of children.
PB - Elsevier BV PY - 2026 SP - 1 EP - 10 T2 - The Lancet Regional Health - Southeast Asia TI - Soil-transmitted helminthiasis prevalence and infection intensity among school-going children in Timor-Leste after the prolonged interruption of deworming: a cross-sectional survey (2025) UR - https://www.sciencedirect.com/science/article/pii/S2772368226001551/pdfft?md5=626d30d45e6bb8c3ef8aed9d51540eec&pid=1-s2.0-S2772368226001551-main.pdf VL - 54 SN - 2772-3682 ER -