Abstract
Reference values for specific IgM, IgA and IgG antibodies against three defined Candida antigens were determined in 280 healthy Swedish children aged 1 month to 15 years. The antibody response in 10 children with Candida infections was also determined. Precipitating IgG antibodies to a mannan-free Candida protein antigen were detected only in children with Candida infection. The haemagglutinating IgM antibody response in healthy children to a polysaccharide Candida antigen was weak. Adult levels of < or = 320 (95% confidence interval, CI) were not reached even in the oldest children (< or = 160). All children with Candida infections had elevated IgM titres. Adult levels of IgA antibodies to Candida mannan were reached at 10-12 years of age; at 13-15 years the titres were higher (< or = 1600) than in healthy adults (< or = 1000, 95% CI). All children with an acute Candida infection had elevated IgA titres. Our study shows that antibody testing may be used to diagnose systemic Candida infection in children and to follow the progression and resolution of systemic Candida infection with the rise and fall of antibody titres.
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