title: Serological cross-reaction between Legionella pneumophila and Citrobacter freundii in indirect immunofluorescence and rapid microagglutination tests.
abstract: We describe the first case in which a diagnostic rise in titers of antibody to formalinized Legionella pneumophila serogroup 1 yolk sac antigen was shown to be caused by a cross-reaction between L. pneumophila and another organism, Citrobacter freundii.
authors.affiliation: Clinical Microbiology and Public Health Laboratory, Addenbrooke's Hospital, Cambridge, United Kingdom.
authors.forename: J J
authors.initials: JJ
authors.lastname: Gray
authors.forename: K N
authors.initials: KN
authors.lastname: Ward
authors.forename: R E
authors.initials: RE
authors.lastname: Warren
authors.forename: M
authors.initials: M
authors.lastname: Farrington
mesh_terms: D000293:Adolescent; D000372:Agglutination Tests; D000907:Antibodies, Bacterial / Q000276:immunology*; D000942:Antigens, Bacterial / Q000276:immunology; D002954:Citrobacter / Q000276:immunology*; D003429:Cross Reactions; D005260:Female; D005455:Fluorescent Antibody Technique; D006801:Humans; D007875:Legionella / Q000276:immunology*; D007877:Legionnaires' Disease / Q000150:complications / Q000175:diagnosis; D008228:Lymphoma, Non-Hodgkin / Q000382:microbiology
chemical_list: D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial