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[Effects od iron supplementation on malaria infection]
J P Chippaux1, D Schneider, A Aplogan
1Entomologiste médical ORSTOM, Antenne OCCGE de Cotonou, Bénin, Cameroun.
Insights
Iron supplementation did not alter malaria susceptibility or immune response in infants aged 6-36 months in Togo. This study found no significant changes in parasite density or antibody titers following iron or placebo interventions.
Area of Science:
- Nutritional Immunology
- Tropical Medicine
- Pediatric Infectious Diseases
Background:
- Malaria remains a significant health challenge in tropical regions, particularly affecting young children.
- Iron deficiency is common in infants and can influence immune function.
- The impact of iron supplementation on malaria susceptibility in endemic areas requires further investigation.
Purpose of the Study:
- To evaluate the effect of daily oral iron supplementation on malaria parasite density and antibody responses in infants.
- To assess whether iron supplementation influences susceptibility to malaria in children aged 6 to 36 months.
- To determine the impact of iron supplementation on the host's immune response to Plasmodium falciparum.
Main Methods:
- A double-blind, randomized placebo-controlled trial involving 241 infants (6-36 months) in Togo during the malaria transmission season.
- Infants received daily oral iron supplementation (G1) or placebo (G2) for three months. A third group (G3) of anemic infants received iron.
- Malaria parasite density, prevalence, and antibody titers were measured at baseline (T0), post-supplementation (T3), and six months later (T9).
Main Results:
- Plasmodium falciparum prevalence remained consistent across all groups and time points.
- Mean parasite density showed a non-significant decrease during and after the rainy season.
- High parasitemia frequency and antibody titers did not significantly differ between iron-supplemented and placebo groups.
Conclusions:
- Daily oral iron supplementation did not significantly alter malaria susceptibility or immune response in infants aged 6 to 36 months.
- Iron supplementation did not affect Plasmodium falciparum parasite density or antibody titers in this cohort.
- Further research may be needed to explore the complex relationship between iron status and malaria in young children.
Abstract:
An iron supplementation trial had been performed in a southern village of Togo during the rainy season when occurs malaria transmission. 241 infants from 6 to 36 months old were matched in two randomized groups. The first one (G1) received oral iron supplementation every day during three months. The second group (G2) received placebo. Tablet administration was double blind made. A third group (G3) had been created from two others with anaemic infants and received daily iron supplementation. Three biological and clinical surveys were done, i) before the trial (T0), ii) after supplementation (T3) and iii) six months later (T9). Several parameters were studied including malaria parasite density and titration of malaria antibodies. For each group the prevalence of Plasmodium falciparum was identical in the three surveys. Means of parasite density decreased during and after rainy season but variations were not significant. High parasitaemia frequency (i.e. greater than 10,000 parasitized red cells per mm3, considered as pyrogenic threshold) were identical in all groups and decreased after rainy season. Antibodies titers did not show any variation in the three groups. It seems that iron supplementation did not modify in 6 to 36 months infants the susceptibility to malaria nor the organism response.
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