title: Serum antibodies to Bacteroides gingivalis in periodontitis: a longitudinal study.
mesh_terms: D000328:Adult; D000907:Antibodies, Bacterial / Q000032:analysis*; D001439:Bacteroides / Q000276:immunology*; D006801:Humans; D007132:Immunoglobulin Isotypes / Q000032:analysis; D008137:Longitudinal Studies; D008875:Middle Aged; D010512:Periodontal Index; D010518:Periodontitis / Q000097:blood* / Q000276:immunology / Q000628:therapy
chemical_list: D000907:Antibodies, Bacterial; D007132:Immunoglobulin Isotypes