Iron and infection in the tropics: paediatric clinical correlates

Area of Science:

• Public Health
• Nutritional Immunology
• Pediatric Infectious Diseases

Background:

• Iron deficiency is a global child health issue, addressed by supplementation and fortification.
• The interplay between iron and infection necessitates clear guidelines for iron interventions.
• Iron overload can increase susceptibility to infections, with varied mechanisms.

Purpose of the Study:

• To review the complex relationship between iron therapy and infection risk in children.
• To highlight the need for evidence-based guidelines for iron supplementation and food fortification.
• To discuss the impact of iron interventions on specific infections like malaria and respiratory diseases.

Main Methods:

• Literature review of studies on iron supplementation, food fortification, and iron chelation.
• Analysis of clinical trial data and observational studies concerning iron and infection.
• Examination of factors influencing iron-infection interactions, including immunity and endemic diseases.

Main Results:

• Parenteral iron in Papua New Guinea linked to increased malaria and respiratory illness in infants.
• Oral iron in African studies showed adverse effects, particularly in immunocompromised children with therapeutic doses.
• Iron chelation therapy demonstrated protection against malaria but potential risk for fungal and Yersinia infections.

Conclusions:

• Iron interventions require careful consideration of endemic disease prevalence, host immunity, and age.
• Optimizing the timing and dosage of oral iron is essential for safe and effective recommendations.
• Balancing iron supplementation benefits against infection risks is critical for public health programs.