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Malaria and vitamin A deficiency in African children: a vicious circle?
Miguel A Sanjoaquin1, Malcolm E Molyneux
1Malawi-Liverpool-Wellcome Trust Clinical Research Programme, College of Medicine, Chichiri, Blantyre 3, Malawi. msanjoaquin@mlw.medcol.mw
Insights
Vitamin A deficiency and malaria impact millions of African children. This review explores their potential bidirectional relationship, suggesting interventions for one may benefit both.
Area of Science:
- Public Health
- Nutritional Science
- Infectious Diseases
Background:
- Vitamin A deficiency and malaria are prevalent in African children under five.
- Both conditions contribute significantly to child mortality in the region.
- Low serum retinol in malaria patients raises questions about causality.
Purpose of the Study:
- To review evidence for a causal link between vitamin A deficiency and malaria.
- To examine the potential for a bidirectional relationship between these two diseases.
- To assess the implications for public health interventions.
Main Methods:
- Literature review of existing studies on vitamin A and malaria.
- Analysis of evidence supporting a causal relationship in both directions.
- Synthesis of findings to inform potential intervention strategies.
Main Results:
- Evidence suggests a complex interplay between vitamin A status and malaria.
- Malaria may exacerbate vitamin A deficiency, and vice versa.
- The relationship's directionality requires further investigation.
Conclusions:
- A bidirectional causal relationship between vitamin A deficiency and malaria is plausible.
- Interventions targeting one condition may offer synergistic benefits for the other.
- Further research is needed to confirm causality and optimize combined interventions.
Abstract:
Vitamin A deficiency and malaria are both highly prevalent health problems in Africa. Vitamin A deficiency affects over 30 million children, most of whom are in the age-group (under five years) most affected by malaria. Vitamin A deficiency increases all-cause mortality in this part of the population, and malaria is an important cause of death in children at this age. A low serum retinol concentration (a marker of vitamin A deficiency) is commonly found in children suffering from malaria, but it is not certain whether this represents pre-existing vitamin A deficiency, a contribution of malaria to vitamin A deficiency, or merely an acute effect of malaria on retinol metabolism or binding. In this paper, available evidence in support of a causal relationship in each direction between vitamin A deficiency and malaria is reviewed. If such a relationship exists, and especially if this is bidirectional, interventions against either disease may convey an amplified benefit for health.
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