title: Detection of antibodies against Legionella pneumophila serogroups 1 to 6 and the Leiden-1 strain by micro ELISA and immunofluorescence assay.
abstract: One hundred and seventy-five human sera were tested for the presence of type-specific antibodies against L pneumophila serogroups 1 to 6 and the Leiden-1 strain by means of an enzyme linked immunosorbent assay (ELISA) and compared with the results obtained by the indirect immunofluorescence assay (IFA). A high correlation (correlation coefficient 0.92) between both methods was found. No consistent pattern of IgG, IgA and IgM classes of antibody titres against L pneumophila were found. In the sera of 15 of 17 patients with a proven L pneumophila pneumonia, IgM class antibodies against L pneumophila could be detected. A "polyvalent" ELISA was developed which permits rapid routine screening of human sera for antibodies against L pneumophila serogroups 1 to 6 and the Leiden-1 strain.
mesh_terms: D000907:Antibodies, Bacterial / Q000032:analysis*; D004797:Enzyme-Linked Immunosorbent Assay; D005455:Fluorescent Antibody Technique; D006801:Humans; D007136:Immunoglobulins / Q000032:analysis; D007875:Legionella / Q000145:classification / Q000276:immunology*; D007877:Legionnaires' Disease / Q000175:diagnosis; D012703:Serotyping
chemical_list: D000907:Antibodies, Bacterial; D007136:Immunoglobulins