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Malnutrition and childhood tuberculosis
M Vijayakumar1, P Bhaskaram, P Hemalatha
1National Institute of Nutrition, Indian Council of Medical Research, Hyderabad.
Insights
Malnutrition worsens tuberculosis in children by suppressing cell-mediated immunity (CMI). Malnourished children with severe tuberculosis exhibit the lowest CMI response, highlighting the importance of nutrition in disease prevention.
Area of Science:
- Pediatrics
- Immunology
- Infectious Diseases
Background:
- Tuberculosis (TB) is a significant global health concern, particularly in children.
- The interplay between malnutrition and TB pathogenesis requires further elucidation.
- Cell-mediated immunity (CMI) plays a crucial role in controlling mycobacterial infections.
Purpose of the Study:
- To investigate the role of malnutrition in the clinical presentation and immune status of children with tuberculosis.
- To assess the impact of nutritional status on cell-mediated immune response in pediatric TB patients.
- To understand the synergistic effects of malnutrition and TB on immune suppression.
Main Methods:
- Investigated CMI status in 65 children with various forms of TB and 30 healthy controls (aged 1-5 years).
- Assessed the association between the severity of malnutrition and the severity of TB infection.
- Compared CMI responses between well-nourished and malnourished children with TB.
Main Results:
- A significant association was found between severe malnutrition and severe forms of TB.
- Tuberculosis itself demonstrated an immunosuppressive effect on CMI in all affected children.
- Malnourished children with severe TB exhibited the most profound suppression of CMI.
- Well-nourished children maintained similar CMI status regardless of TB severity.
Conclusions:
- Malnutrition exacerbates immune suppression in children with tuberculosis.
- There is a synergistic interaction between malnutrition and TB, leading to more severe immunosuppression.
- Maintaining optimal nutritional status is crucial for preventing severe forms of childhood tuberculosis and enhancing immune defense.
Abstract:
Cell-mediated immune status (CMI) of sixty-five children suffering from various clinical forms of tuberculosis and thirty age- and sex-matched healthy children aged between 1 and 5 years was investigated to understand the role of malnutrition in tuberculosis. A significant association between severe malnutrition and severe forms of infection was observed. Data on CMI showed immunosuppressive effect of tuberculosis per se in all children. Well nourished children had similar CMI status irrespective of the severity of the disease while malnourished children with severe forms of disease showed lowest CMI response. These data suggest not only the synergistic interactions of malnutrition and tuberculosis, but the contributory role of malnutrition in causing more severe immuno suppression. The results point out the importance of better nutritional status of the child in preventing the severe forms of the disease.