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Vitamin A supplementation and childhood malaria in northern Ghana
F N Binka1, D A Ross, S S Morris
1Ministry of Health, Ghana.
Insights
Vitamin A supplementation did not impact malaria in young Ghanaian children. Studies found no difference in malaria parasitemia, illness, or mortality rates between supplemented and placebo groups.
Area of Science:
- Public Health
- Tropical Medicine
- Nutritional Science
Background:
- Malaria remains a significant cause of childhood mortality in Sub-Saharan Africa.
- Vitamin A deficiency is common in regions with high malaria endemicity.
- Prophylactic vitamin A supplementation is a potential intervention to reduce malaria burden.
Purpose of the Study:
- To evaluate the effect of prophylactic vitamin A supplementation on malaria parasitemia, morbidity, and mortality in young children in northern Ghana.
- To determine if baseline serum retinol levels correlate with malaria parasitemia.
Main Methods:
- Two companion randomized, placebo-controlled trials were conducted.
- A mortality study involved 21,906 children over 2 years with 4-monthly visits.
- A morbidity study involved 1455 children over 1 year with weekly visits.
Main Results:
- No significant differences were observed in malaria mortality rates (rate ratio = 1.03; 95% CI 0.74, 1.43) between vitamin A and placebo groups.
- Malaria parasitemia rates, parasite densities, and probable malaria illness incidence did not differ between treatment groups.
- No correlation was found between initial serum retinol levels and subsequent malaria parasitemia in the placebo group (r = 0.01).
Conclusions:
- Prophylactic vitamin A supplementation demonstrated no impact on malaria parasitemia, morbidity, or mortality in young Ghanaian children.
- These findings suggest vitamin A supplementation is not an effective strategy for malaria control in this population.
- Further research may be needed to explore other nutritional interventions for malaria prevention.
Abstract:
Two companion, randomized, placebo-controlled trials of prophylactic vitamin A supplementation provided the opportunity to assess the impact of supplementation on malaria parasitemia, morbidity, and mortality in young children in northern Ghana. In the mortality study, 21,906 children were visited every 4 mo over 2 y, and in the morbidity study 1455 children were visited weekly for 1 y. There was no difference between children supplemented with vitamin A and those given placebo in malaria mortality rates (rate ratio = 1.03; 95% CI 0.74, 1.43) or fever incidence based on reported symptoms. Malaria parasitemia rates, parasite densities in children with a positive blood smear, and rates of probable malaria illness also did not differ between treatment groups. There was no correlation between serum retinol at the beginning of the trial and subsequent malaria parasitemia in children who received placebo (r = 0.01). It is concluded that vitamin A supplementation had no impact on malaria in this population.