41 Preventive chemotherapy in human helminthiasis Category Prevalence of any Action to be taken STH infection among school-aged children High-risk community –50% Treat all school-age children Also treat: (enrolled and not enrolled) • preschool children; twice each year b • women of childbearing age, including pregnant women in the 2nd and 3rd trimesters and lactating women; • adults at high risk in certain occupations (e.g. tea-pickers and miners) Low-risk community –20% and <50% Treat all school-age children Also treat: (enrolled and not enrolled) • preschool children; once each year • women of childbearing age, including pregnant women in the 2nd and 3rd trimesters and lactating women; • adults at high risk in certain occupations (e.g. tea-pickers and miners) Table A2.1 Recommended treatment strategy for STH in preventive chemotherapy a a When prevalence of any STH infection is less than 20%, large-scale preventive chemotherapy interventions are not recommended. Affected individuals should be dealt with on a case-by-case basis. b If resources are available, a third drug distribution intervention might be added. In this case the appropriate frequency of treatment would be every 4 months.
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41Preventive chemotherapy in human helminthiasis
Category Prevalence of any Action to be takenSTH infection amongschool-aged children
High-risk community –50% Treat all school-age children Also treat:(enrolled and not enrolled) • preschool children;twice each yearb • women of childbearing age,
including pregnant women in the2nd and 3rd trimesters andlactating women;
• adults at high risk in certainoccupations (e.g. tea-pickers andminers)
Low-risk community –20% and <50% Treat all school-age children Also treat:(enrolled and not enrolled) • preschool children;once each year • women of childbearing age,
including pregnant women in the2nd and 3rd trimesters andlactating women;
• adults at high risk in certainoccupations (e.g. tea-pickers andminers)
Table A2.1 Recommended treatment strategy for STH in preventive chemotherapya
a When prevalence of any STH infection is less than 20%, large-scale preventive chemotherapy interventions are not recommended. Affected individuals should be dealt with on acase-by-case basis.b If resources are available, a third drug distribution intervention might be added. In this case the appropriate frequency of treatment would be every 4 months.
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