title: A polysaccharide-protein complex from Haemophilus influenzae type b. II. Human antibodies to its somatic components.
abstract: A polysaccharide-protein complex prepared from Haemophilus influenzae type b strain Eagan was used as test antigen in an enzyme-linked immunosorbent assay for human serum antibodies. With washing buffer that did not contain detergent, the assay detected antibody to lipopolysaccharide (LPS) and to non-LPS somatic antigens as well as to polyribosylribitolphosphate (PRP. With buffer that did contain detergent, antibodies to LPS were not detected, whereas detection of antibodies to the non-LPS somatic components and to PRP wa unimpeded. Similarly, purified LPS could be used as test antigen with the former buffer only. IgG, IgA, and IgM antibodies to non-LPS somatic antigens were prevalent in healthy adults and children, and levels increased in 14 of 15 patients recovering from meningitis due to H. influenzae type b; IgG was the predominant class. Antibodies to LPS were prevalent but at lower concentrations, and IgM was the predominant class; levels increased in 12 of the 15 patients.
mesh_terms: D000328:Adult; D000907:Antibodies, Bacterial / Q000096:biosynthesis*; D000918:Antibody Specificity; D001426:Bacterial Proteins / Q000276:immunology*; D001666:Binding Sites, Antibody; D002675:Child, Preschool; D004797:Enzyme-Linked Immunosorbent Assay; D006193:Haemophilus influenzae / Q000276:immunology; D006801:Humans; D007070:Immunoglobulin A / Q000096:biosynthesis; D007074:Immunoglobulin G / Q000096:biosynthesis; D007075:Immunoglobulin M / Q000096:biosynthesis; D008070:Lipopolysaccharides / Q000276:immunology*; D010428:Pentosephosphates / Q000276:immunology*; D011135:Polysaccharides, Bacterial / Q000276:immunology*
chemical_list: D000907:Antibodies, Bacterial; D001426:Bacterial Proteins; D007070:Immunoglobulin A; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D008070:Lipopolysaccharides; D010428:Pentosephosphates; D011135:Polysaccharides, Bacterial; C003191:polyribose phosphate