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Hookworm control as a strategy to prevent iron deficiency
R J Stoltzfus1, M L Dreyfuss, H M Chwaya
1Center for Human Nutrition, Johns Hopkins School of Hygiene and Public Health, Baltimore, Maryland 21205, USA.
Nutrition Reviews
|June 1, 1997
Summary
Hookworm infections impact 1 billion people, causing anemia through intestinal blood loss. Anthelminthic treatment improves hemoglobin, especially with iron supplementation, but long-term effects on iron deficiency anemia require further study.
Area of Science:
- Global Health
- Infectious Diseases
- Nutritional Science
Background:
- Hookworm infections (Necator americanus, Ancylostoma duodenale) affect ~1 billion people globally.
- Infection intensity correlates with intestinal blood loss and anemia, particularly in adults.
- Current control relies on anthelminthic chemotherapy to reduce worm burden and transmission.
Purpose of the Study:
- To review the impact of hookworm infections on anemia.
- To evaluate the effectiveness of anthelminthic chemotherapy for anemia control.
- To identify knowledge gaps in hookworm-related iron deficiency anemia.
Main Methods:
- Review of epidemiological studies on hookworm intensity and hemoglobin levels.
- Analysis of controlled trials on anthelminthic treatment efficacy.
- Examination of current World Health Organization (WHO) recommendations for control programs.
Main Results:
- Anthelminthic treatment positively impacts hemoglobin levels, with enhanced effects when combined with iron supplementation.
- Programs show modest short-term benefits for iron deficiency anemia, with greater impact on severe anemia.
- Hookworms are a significant cause of anemia in women, often excluded from current control efforts.
Conclusions:
- Hookworm control through anthelminthics offers benefits for anemia, particularly severe cases, but requires integrated iron strategies.
- Current control programs need to better address anemia in women.
- Further research is needed to determine the role of hookworms in preschool children's iron deficiency anemia.