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Recurrent respiratory disease in Polynesian children
Insights
Polynesian children with recurrent respiratory disease showed high IgG levels and iron deficiency anemia. Cow
Area of Science:
- Pediatric respiratory health
- Immunology
- Nutritional deficiencies
Background:
- Recurrent respiratory disease is a significant health concern in Polynesian children.
- Previous studies suggest potential links between environmental factors and pediatric respiratory illnesses.
Purpose of the Study:
- To investigate the clinical and immunological characteristics of Polynesian children with recurrent respiratory disease.
- To explore potential contributing factors, including nutritional status and immune responses.
- To assess the role of cow's milk protein in the observed respiratory symptoms.
Main Methods:
- Clinical assessment of 13 Polynesian children with recurrent respiratory disease.
- Evaluation of nutritional status (including iron deficiency anemia).
- Measurement of serum immunoglobulin (IgG, IgA, IgM) levels.
- Testing for precipitating antibodies to cow's milk protein.
- Assessment of lymphocyte rosette-forming cell proportion.
- Mantoux testing for tuberculosis exposure.
Main Results:
- Most children presented with iron deficiency anemia; only one was underweight.
- Elevated serum IgG levels were observed, with a trend towards increased IgA and IgM.
- Precipitating antibodies to cow's milk protein were detected in 60% of children on cow's milk.
- Reduced proportion of rosette-forming lymphocytes in 8 out of 12 children.
- Negative Mantoux tests in 70% of BCG-vaccinated children.
Conclusions:
- The study highlights significant immunological and nutritional abnormalities in Polynesian children with recurrent respiratory disease.
- Cow's milk protein may contribute to respiratory symptoms in this population.
- Further research is warranted to elucidate the complex interplay of factors influencing pediatric respiratory health in this region.
Abstract:
Studies were performed on 13 Polynesian children who suffered from recurrent respiratory disease characterised by cough, wheeze, tachypnoea and radiological opacities. Only one was substantially underweight. Most had iron deficiency anaemia. Serum IgG levels were high with a less definite trend to raised IgA and IgM levels. Precipitating antibodies to cow's milk protein were found in 6 out of 10 children tested who were currently on cow's milk feeds. The proportion of rosette-forming lymphocytes was reduced in 8 of the 12 tested. The Mantoux test using using 10 TU of PPD was negative in 7 out of 10 children who had had BCG in the newborn period. The likelihood of cow's milk contributing to the respiratory disease in these children is discussed.