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Systematic review reveals strong links between soil-transmitted helminth infections and nutritional deficits, suggesting improved outcomes through deworming and supplementation.
Background: Soil-transmitted helminth (STH) infections—caused by Ascaris lumbricoides, Trichuris trichiura, and hookworms—affect over 1.5 billion people worldwide. These infections exacerbate undernutrition through blood loss, nutrient malabsorption, and impaired appetite. Objectives: To evaluate the relationship between STH infections and nutritional deficits, including anaemia, micronutrient deficiencies, growth impairments, and cognitive outcomes, and assess the effectiveness of deworming interventions. Methods: Literature search in PubMed, Scopus, Web of Science, and EMBASE (2007–2023). Data synthesized narratively; a meta-analysis performed for haemoglobin outcomes. Results: 19 studies included. Hookworm infection strongly associated with iron-deficiency anaemia (pooled mean difference: −0.78 g/dL). Other helminths contributed to reduced micronutrient levels, stunting, and poor cognitive outcomes. Nutritional recovery observed when deworming combined with supplementation and sanitation. Conclusion: STH infections significantly contribute to nutritional deficits, particularly among children. Sustainable control requires integrated deworming, nutrition, sanitation, and education.
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Shokeen et al. (2025) studied this question.
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