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Table 1 Soil-transmitted helminth infection prevalence in SAC before and five or more years after initiation of preventive chemotherapy for STH in the 15 countries

From: Sustained preventive chemotherapy for soil-transmitted helminthiases leads to reduction in prevalence and anthelminthic tablets required

WHO region Country N Ascaris lumbricoides prevalence (95 CI %) Trichuris trichiura prevalence (95 CI %) Hookworms prevalence (95 CI %) Any STH prevalence (95% CI) Year of survey [data source] Diagnostic test Type of survey Sampled population Number of year of STH PC with effective coverage by 2017 Number of years between the two data collection
Africa Burkina Faso 5146 0 (0.-0.2) 0.5 (0.3-0.7) 5.6 (3.5-8.9) 5.8 (3.7-8.9) 2004 [EPIRF] Kato-Katz National baseline survey SAC 10 13
7124 0 (0-0.1) 0 (0-0.1) 0.3 (0.1-0.6) 0.3 (0.1-0.6) 2017 [EPIRF] Follow up through LF TAS
Burundi 5700 20 10 14 35 2008 [8] Kato-Katz National baseline survey SAC 12 6
12621 16.7 (14.7-18.9) 4.7 (3.9-5.6) 5.1 (4.4–5.9) 22.8 (21.2–24.4) 2014 [EPIRF] National follow up survey
Mali 13318 0.1 (0-0.2) 0.3 (0.2-0.5) 7.4 (5.3-10.3) 7.4 (5.4-10.2) 2004 [EPIRF] Kato-Katz National baseline survey SAC 8 10
4672 0 (0-0) 0 (0- 0.2) 0.1 (0-0.3) 1.7 (1.2-2.5) 2014 [EPIRF] Follow up through LF TAS
Ghana 4577 3.02 (2.5-3.5) 0.46 (0.26-0.66) 3.93 (3.4-4.5) 7.4 2008 [9] Kato-Katz National baseline survey SAC 5 6
7747 0.8 (0.4-1.7) 0.4 (0.2-0.8) 1.8 (1.2-2.7) 3.0 (2- 4.5) 2014 [EPIRF] National follow up survey
Togo 16350 0.3 (0.2-0.5) 0.2 (0.2-0.3) 31.9 (30.4-33.5) 31 (29.6-32.4) 2009[EPIRF] Kato-Katz National baseline survey SAC 5 6
16890 NA NA 11.1 NA 2015 [10] National follow up survey
Sierra Leone 5069 7.2 (5.8-8.6) 3.3 (2.5-4.2) 32.5 (28.7-36.3) 39.1 (37.8-40.5) 2008 [11] Kato-Katz National baseline survey SAC 8 7
3632 4.4 (3-6.3) 0.8 (0.4-1.4) 14.8 (9.8-21.8) 18.2 (13.3-24.3) 2015 [EPIRF] Kato-Katz Not specify
Cameroon 22166 45.3 58.4 18 90.06 1985-1987 [12, 13] Kato-Katz National baseline survey SAC 10 25
13050 0.7 (0.3-1.8) 0.6 (0.2-1.5) 3.5 (2.7-4.4) 4.2 (3.2-5.5) 2012 [EPIRF] National follow up survey
Rwanda 8312 38.6 (37.6-39.7) 27 (26.0-27.9) 31.7 (30.7-32.7) 65.8 (64.8-66.8) 2008 [14] Kato-Katz National baseline survey SAC 6 6
9251 37.2 (26.9-48.9) 22.9 (14.5-34.1) 4.5 (3.2-6.4) 45.2 (34.1-56.8) 2014 [EPIRF] National follow up survey
Americas Haiti 5795 27.3 7.3 3.8 34.2 2002 [15] Kato-Katz National baseline survey SAC 6 12
3844 12.3 (11.3-13.4) 12.1 (11.1-13.2) 0.6 (0.4-0.9) 22.1 (20.8-23.4) 2014* National follow up survey
Mexico 13804 20.25 15.42 NA NA 2008 [16] Kato-Katz National baseline survey SAC 8 6
4950 11.2 (5.6-21.2) 3.7 (1.7-8.2) 0.5(0.2-1.3) 15.50(7.6-28.9) 2015 [EPIRF] Follow up survey
Nicaragua 880 20.7 34.7 1.4 46 2005 [17] Kato-Katz cross-sectional survey SAC 14 9
2804 5.3 (2.3-11.7) 12.8 (7.6-20.7) 0.1(0-0.5) 18.3 (10.8-29.2) 2014 [EPIRF] Follow up survey
South-East Asia Bangladesh 792 NA NA NA 79.8 2005 [18] Kato-Katz National baseline survey SAC 6 12
6214 7.4 (2.2-22.2) 2.7 (0.6 - 11) 0.8 (0.4-1.7) 10.9 (4.2-25.6) 2017 [EPIRF] Follow up survey
Bhutan 266 12.8 5.6 1.1 16.5 2003** Kato-Katz National baseline survey SAC 5 14
1456 0.8 (0.3-1.2) 0.5 (0.2-0.9) 0.2 (0.0-0.4) 1.4 (0.8-2.0) 2017** Mini-Flotac National follow up survey
Myanmar 1000 48.5 (45.3-51.6) 57.5 (54.3-60.5) 6.5 (5.1-8.2) 69.7 (66.7-72.5) 2002 [19] Kato-Katz National baseline survey SAC 12 10
990 5.8 (4.4-7.2) 18.6 (16.2-21.0) 0.3 (0-0.6) 20.9 (18.4-23.4) 2012 [20] National follow up survey
Western Pacific Lao People's Democratic Republic 29846 34.9 25.8 19.1 61.9 2002 [21] Kato-Katz National baseline survey SAC 6 14
1341 7.1 (1.8-24.5) 8.1 (1.8 - 24.5) 17.1 (5.9-40.3) 23.5 (8.2 - 51.5) 2016 [EPIRF] Follow up survey
  1. NA Data not available, SAC school-aged children, EPIRF Epidemiological data Reporting Form, LF Lymphatic Filariasis, TAS transmission assessment survey
  2. *Ministère de la santé publique et de la population, 2014. Evaluation de la prévalence des helminthiases intestinales chez les enfants de 6 à 15 ans scolarisés en Haïti. Unpublished
  3. **Comprehensive school health program, Health promotion division, department of public health, Ministy of health , Royal Government of Bhutan, 2017. Report on soil-transmitted helminths survey among school children in Bhutan. Unpublished