title: [IgG4 levels in polyvalent immunoglobulins and immunoglobulins prepared by precipitation with caprylic acid].
abstract: Levels of IgG4 in immunoglobulin preparations obtained either by conventional ethanol fractionation or by ethanol and caprylic acid fractionation (Allergam) were measured by an enzyme-immunoassay (competitive Elisa). In 9 ethanol preparations, the mean percentage of IgG4 was 2.1% +/- 0.5. In 10 preparations of Allergam, the mean percentage of IgG4 was 4.6% +/- 1. The concentration of IgG4 in Allergam preparations is about twice the concentration found in conventional ethanol preparations.
mesh_terms: D004797:Enzyme-Linked Immunosorbent Assay; D006801:Humans; D007106:Immune Sera / Q000032:analysis; D007073:Immunoglobulin E / Q000032:analysis; D007074:Immunoglobulin G / Q000032:analysis*
chemical_list: D007106:Immune Sera; D007074:Immunoglobulin G; C052243:allergam; D007073:Immunoglobulin E
vernacular_title: Taux des IgG4 dans les immunoglobulines polyvalentes et dans les immunoglobulines obtenues par précipitation à l'acide caprylique.