Enzyme immunoassay for detection of human immunodeficiency virus-specific immunoglobulin A antibodies

Age-related pattern of immunoglobulins G, A and M in children born to HIV-seropositive women

In a cohort of 56 children born to HIV-seropositive African women, 19 met the criteria for HIV-infected children and 37 remained antibody-negative at 18 months of age. Blood samples taken at birth and 3-monthly until 18 months of age were processed and analysed by laser nephelometry for serum immunoglobulin (IgG, IgA and IgM) levels. In the infected group of children. higher levels of IgG were observed during their 1st 18 months of life reaching statistical significance at 3, 6, 15 and 18 months. Higher levels of IgA at 3 months and at 15 and 18 months, and higher levels of IgM at 3 months and 18 months later were statistically significant. All four infected children who died before the age of 6 months showed signs of hypergammaglobulinaemia (IgG and IgA) by 3 months of age. In this study the earliest and most common immunological abnormality was hypergammaglobulinaemia and infected infants with higher morbidity and mortality had more evident immunoglobulin abnormalities than infected children who survived. However, the immunological abnormalities in this small cohort did not precede the onset of severe symptoms and cannot therefore be used to predict clinical outcome.