Antibody Response to Pneumococcal Polysaccharides in Insulin-dependent Diabetes Mellitus

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Abstract
Twenty-one insulin-dependent diabetics and 11 healthy control children were immunized with polyvalent pneumococcal polysaccharide vaccine. Serum antibody to pneumococcal polysaccharides was measured by radioimmunoassay before and after immunization. Although there were some differences in type-specific antibody concentrations between diabetic and control subjects, the overall antibody concentrations preimmunization, 3–4 wk postimmunization, and 6–7 wk postimmunization were similar in both populations. In both groups antibody response to immunization correlated strongly with preimmunization antibody concentration. Among the diabetic subjects there was no correlation between antibody responses and duration of disease, insulin dose, or concentration of glycosylated hemoglobin. Insulin-dependent diabetic subjects have a serum antibody response to pneumococcal polysaccharides equivalent to that of controls, and in both populations the magnitude of the antibody response correlates with preimmunization antibody levels.

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