Related Experiment Videos
Vitamin A deficiency and T-cell subpopulations in children with meningococcal disease
R D Semba1, M Bulterys, V Munyeshuli
1Department of Ophthalmology, School of Medicine, Johns Hopkins University, Baltimore, MD, USA.
Insights
Meningococcal meningitis in children is linked to vitamin A deficiency and altered T-cell subsets. This study highlights key immune and nutritional issues in affected African children.
Area of Science:
- Pediatric infectious diseases
- Immunology
- Nutritional science
Background:
- Group A meningococcal disease poses a significant threat to child health in sub-Saharan Africa.
- Limited data exists on vitamin A status and T-cell subpopulations in children with meningococcal meningitis.
- Understanding these factors is crucial for improving outcomes in affected children.
Purpose of the Study:
- To investigate vitamin A levels in children hospitalized with meningococcal meningitis.
- To analyze T-cell subpopulations (CD4 and CD8) in these children.
- To explore the relationship between vitamin A status, T-cell changes, and meningococcal disease severity.
Main Methods:
- A prospective study was conducted on 41 children hospitalized with meningococcal meningitis in Rwanda during an epidemic.
- Serum vitamin A levels were measured and categorized as subclinical or severe deficiency.
- T-cell subpopulations (CD4% and CD8%) were analyzed and compared to reference populations.
Main Results:
- The case-fatality rate was 20%.
- A high prevalence of vitamin A deficiency was observed: 73% had subclinical deficiency and 27% had severe deficiency.
- Children with meningitis showed higher mean CD4% and lower mean CD8% compared to reference groups.
Conclusions:
- Meningococcal disease in children is associated with significant vitamin A deficiency.
- Alterations in T-cell subpopulations (increased CD4%, decreased CD8%) are characteristic of meningococcal meningitis.
- These findings underscore the importance of assessing vitamin A status and immune function in children with meningococcal disease.
Abstract:
Although group A meningococcal disease is a major cause of child morbidity and mortality in sub-Saharan Africa, little is known about vitamin A status and T-cell subpopulations in affected children. A prospective study of vitamin A levels and T-cell subpopulations was conducted in 41 children hospitalized for meningococcal meningitis in Butare, Rwanda, during an epidemic from September through November, 1992. The mean age of cases was 3.6 +/- 2.7 years (range 0.5-16 years). The case-fatality rate was 20 per cent; 73 per cent of the children had serum vitamin A levels consistent with subclinical deficiency (< 0.7 mumol/l), and 27 per cent had levels consistent with severe deficiency (< 0.35 mumol/l). Mean CD4 per cent was higher and CD8 per cent was lower among children with meningitis compared with known reference populations. These results suggest that meningococcal disease is characterized by T-cell subpopulation alterations and vitamin A deficiency.