title: Radioimmunoassay for Bacteroides fragilis infections.
abstract: Radioimmunoassay methods were evaluated for immunoglobulin G and immunoglobulin M antibodies against Bacteroides fragilis antigen. Of 12 serum samples from patients with B fragilis infections, 9 had higher concentrations of immunoglobulin G antibodies than any from 11 control subjects. Of 9 serum samples from infected patients, 6 had higher concentrations of immunoglobulin M than any from control subjects. Six serum samples from patients with Escherichia coli bacteremia did not contain elevated concentrations of immunoglobulin G or immunoglobulin M antibodies against B. fragilis antigen.
mesh_terms: D000907:Antibodies, Bacterial / Q000032:analysis*; D001442:Bacteroides Infections / Q000276:immunology*; D001441:Bacteroides fragilis / Q000276:immunology*; D000939:Epitopes; D004926:Escherichia coli / Q000276:immunology; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis; D007075:Immunoglobulin M / Q000032:analysis; D011863:Radioimmunoassay
chemical_list: D000907:Antibodies, Bacterial; D000939:Epitopes; D007074:Immunoglobulin G; D007075:Immunoglobulin M