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Immunological background in children with persistent diarrhea in Ghana
K Taniguchi1, T Rikimaru, J E Yartey
1Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana. tanigk@nih.go.jp
Insights
Persistent diarrhea in children is linked to poor nutrition and weakened cellular immunity. These factors, including lower protein turnover and altered T-cell profiles, contribute to prolonged illness, especially in developing nations.
Area of Science:
- Pediatrics
- Immunology
- Nutritional Science
Background:
- Persistent diarrheal diseases pose a significant health challenge in developing countries.
- Risk factors for persistent diarrhea remain understudied.
- This study compares nutritional and immunological profiles of children with persistent vs. acute diarrhea.
Purpose of the Study:
- To investigate the nutritional and immunological factors associated with persistent diarrhea in children.
- To compare these factors between children with persistent diarrhea and those with acute diarrhea.
Main Methods:
- Children presenting with diarrhea at a hospital in Accra were assessed for nutritional and immunological status.
- Patients were categorized into acute (diarrhea < 2 weeks) or persistent (diarrhea > 2 weeks) groups based on follow-up.
- Nutritional and immunological data from the initial visit were compared between the two groups.
Main Results:
- Children with diarrhea generally showed undernutrition and impaired cellular immunity compared to healthy controls.
- Persistent diarrhea cases exhibited lower levels of long half-life, rapid turn-over proteins.
- Persistent diarrhea was associated with a higher percentage of CD8+ cells, a lower CD4/CD8 ratio, and reduced CD25 expression on CD4+ cells.
Conclusions:
- Severe nutritional status and impaired cellular immunity are linked to the persistence of diarrhea.
- Findings support the hypothesis that compromised immunity and nutrition contribute to prolonged diarrheal episodes.
Background:
Persistent diarrheal diseases have become one of the most serious medical problems in developing countries, but few studies have been conducted to determine the risk factors. In the present study, we investigated the nutritional and immunological background in children with persistent diarrhea in comparison with those with acute diarrhea.
Methods:
Children with diarrhea who were brought to the Oral Rehydration Salt Clinic of Princess Marie Louise Children's Hospital in Accra were evaluated from an immunological and nutritional aspect. In the follow-up visit, the cases whose diarrhea stopped within 2 weeks after onset were classified into the acute diarrhea group; those with diarrhea lasting more than 2 weeks were classed in the persistent group. Nutritional and immunological data at the initial visit were compared between these two groups.
Results:
In general, the diarrhea cases had a tendency to undernutrition and impaired cellular immunity compared with healthy control. Persistent cases had lower values for longer half-life, rapid turn-over proteins. Persistent cases had a higher percentage of CD8+ cells and lower CD4/CD8 ratio. CD25 expression in CD4+ cells stimulated by anti-CD3 antibody was lower in the persistent diarrhea group.
Conclusion:
These results appear to support the hypothesis that more severe nutritional status and impairment of cellular immunity is related to the persistence of diarrhea.