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The impact of population level deworming on the haemoglobin levels of schoolchildren in Tanga, Tanzania

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Summary

The impact of albendazole (400 mg) and praziquantel (40 mg/kg body weight) treatment of schoolchildren was compared with placebo according to the presence of anaemia (haemoglobin concentration < 11.0 g/dl) and heavy (> 5000 epg) or light (< 5000 epg) hookworm egg load. The study was conducted in rural Tanga. Medication was administered in September 1994 and children were followed-up in January 1995. Overall, anthelminthic treatment reduced the fall in haemoglobin concentration compared with that observed in the placebo group (− 0.11 g/dl vs. − 0.35 g/dl; = 0.02). Anthelminthic treatment was of greatest benefit to the 9% of children with both anaemia and heavy hookworm egg load (+ 0.67 g/dl vs. − 0.67 g/dl) and was also of significant benefit to the 38% of children with anaemia and light hookworm egg load (+ 0.07 g/dl vs. − 0.21 g/dl). It was of no significant benefit to children who were not anaemic. This study suggests that single-dose anthelminthic treatment distributed in schools in this area achieves haematological benefits in nearly half of children infected with S. haematobium and geohelminths (37% of total population).
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Keywords: Ascaris lumbricoides; Schistosoma haematobium; Tanzania; Trichuris trichiura; anaemia; deworming; gut helminths; hookworm; schoolchildren

Document Type: Research Article

Affiliations: 1: Wellcome Trust Centre for the Epidemiology of Infectious Diseases, University of Oxford 2: Centre for International Child Health, Institute of Child Health, University College, London 3: UKUMTA (Tanzania Partnership for Child Development), Dar es Salaam, Tanzania 4: Tanzania Food and Nutrition Centre, Dar es Salaam, Tanzania

Publication date: 1999-11-01

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